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  1. #1401
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    I've finally got the spacers all in house for those wanting to fit bigger tyres to the STD models.
    There are three spacers, Comp models use all three (incl travel adjust), Pro uses two of them. Take a look and tell me if this makes sense:

    https://www.shockcraft.co.nz/mastodo...t-manitou.html
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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  2. #1402
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    Does the unmodified (no extra spacers) Mastodon STD fork take 26x4.8 tires? Some website reviews say yes but the company's chart says no. Thanks

  3. #1403
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    it works with JJ 4.8 on my canyon dude.

  4. #1404
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    Quote Originally Posted by Lookbiker View Post
    Does the unmodified (no extra spacers) Mastodon STD fork take 26x4.8 tires? Some website reviews say yes but the company's chart says no. Thanks
    Clearing my Bud no problem.
    2017 Santa Cruz Tallboy C 29er
    2018 Canyon Dude fatty with Mastodon
    2018 Nashbar Sora Alloy gravel bike

  5. #1405
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    Quote Originally Posted by Lookbiker View Post
    Does the unmodified (no extra spacers) Mastodon STD fork take 26x4.8 tires? Some website reviews say yes but the company's chart says no. Thanks
    That depends entirely on who made the 4.8" tyre and what it actually measures at. I've got a Mastodon customer with Jumbo Jim 4.8's that he measured at 766mm. So close to the 758mm OD that he decided to run with it stock. This is possibly the same website review you mention.

    Officially the max you can run at standard height is (29.8" OD - 22" rim)/2 = 3.92" height.
    The 766mm measurement puts the JJ 4.8 (as measured) at 30.16" OD which makes them 4.08" tall from rim bead.

    Bottom line, is step outside the manufacturers specs at your own risk.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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  6. #1406
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    Thanks. Going with the Extended version. I don't want to change to a different tire down the road only to discover that it doesn't fit. The 120mm Extended version has an axle to crown of 551mm so going with the 100mm Useful information here. Thank you

  7. #1407
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    Quote Originally Posted by Lookbiker View Post
    Thanks. Going with the Extended version. I don't want to change to a different tire down the road only to discover that it doesn't fit. The 120mm Extended version has an axle to crown of 551mm so going with the 100mm Useful information here. Thank you
    Unless you need 150mm travel with 5" rubber you're probably better with the STD version and some extra spacers under the bumpers.

    A 120mm STD can be configured with a few spacers to do exactly the same tyre fitment and travel as a 100mm EXT. While still being able to fit up to 150mm travel with 4" rubber and having options in between.

    It maximises your future options. Where a 100mm EXT version limits them.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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  8. #1408
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    Is it hard to change spacers on the STD ? Also, any advantage to going with the std with spacers versus 120mm Ext ? Thanks

  9. #1409
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    Quote Originally Posted by Lookbiker View Post
    Is it hard to change spacers on the STD ? Also, any advantage to going with the std with spacers versus 120mm Ext ? Thanks
    Changing spacers is lower legs off and they're right there.

    A standard has the option to go lower A-C if you fit smaller rubber in the future, the EXT can't without swapping shafts. That's basically it.

    If you're buying a fork to fit to one bike and never going to change it's not an issue. But I know the average MTBR forum user likes to swap stuff.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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  10. #1410
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    It will be used 95% in the winter so 120 to 100mm will be fine. Leaning toward the 10Omm because the Big Jion is specíd for a 511 axle to crown. Thank you

  11. #1411
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    Hi, sorry if I missed the point, but have not been following the thread for a long time.
    I have bought a Pole Taiga with 5.05" 2xl Vee Tyres. I suppose the only model to use for that tyre is the EXT version.
    But have I understood correctly if you want to go for a smaller tire, that it is possible to take down the length on the EXT, so it will be similar to the Standard version, with taking out spacers?

  12. #1412
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    Quote Originally Posted by Rumblefish2010 View Post
    Hi, sorry if I missed the point, but have not been following the thread for a long time.
    I have bought a Pole Taiga with 5.05" 2xl Vee Tyres. I suppose the only model to use for that tyre is the EXT version.
    But have I understood correctly if you want to go for a smaller tire, that it is possible to take down the length on the EXT, so it will be similar to the Standard version, with taking out spacers?
    The EXT has longer internal shafts and cannot be lowered as far as the STD.

    The STD with spacers can do the same tyre size as the EXT, but loses 20mm of travel due to the shorter rods internally.
    The STD with spacers is 5.25" max tyres and 130mm max travel.
    The EXT can do 5.25" max tyres with 150mm max travel.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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  13. #1413
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    Quote Originally Posted by Dougal View Post
    The EXT has longer internal shafts and cannot be lowered as far as the STD.

    The STD with spacers can do the same tyre size as the EXT, but loses 20mm of travel due to the shorter rods internally.
    The STD with spacers is 5.25" max tyres and 130mm max travel.
    The EXT can do 5.25" max tyres with 150mm max travel.
    Dougal...I think you need to emphasize the STD needs the "bottom out" spacers ( seeing so many people here are confused)
    The VEe 5.05 will slightly rub the crown when it bottoms.....the EXT has plenty of clearance.

  14. #1414
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    Quote Originally Posted by the mayor View Post
    Dougal...I think you need to emphasize the STD needs the "bottom out" spacers ( seeing so many people here are confused)
    The VEe 5.05 will slightly rub the crown when it bottoms.....the EXT has plenty of clearance.
    Absolutely. What's the OD of the Vee 5.05? These guys say 31.25": https://fat-bike.com/2015/08/product...2xl-5-05-tire/

    If that's true at 793mm then you need the full 20mm of spacers under the bottom-out bumpers in the STD fork. Which gives it the same bottom-out clearance as the EXT.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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  15. #1415
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    Quote Originally Posted by Dougal View Post
    Absolutely. What's the OD of the Vee 5.05? These guys say 31.25": https://fat-bike.com/2015/08/product...2xl-5-05-tire/

    If that's true at 793mm then you need the full 20mm of spacers under the bottom-out bumpers in the STD fork. Which gives it the same bottom-out clearance as the EXT.
    Yup....it's a big tire. You might be able to get away with just 1 10mm spacer....but , yes, the full 20 would be better.
    I took a 120 STD...and with all the air let out, bounced it to compress the bumper and got the 5.05 to slightly rub while rolling along slow. It may or may not be worse at speed ( I wasn't going to try that)

  16. #1416
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    Quote Originally Posted by Rumblefish2010 View Post
    Hi, sorry if I missed the point, but have not been following the thread for a long time.
    I have bought a Pole Taiga with 5.05" 2xl Vee Tyres. I suppose the only model to use for that tyre is the EXT version.
    But have I understood correctly if you want to go for a smaller tire, that it is possible to take down the length on the EXT, so it will be similar to the Standard version, with taking out spacers?
    You can technically can take out spacers....but because of the longer air shaft.....it won't work out well ( I tried it)
    Don't over think it and buy a EXT

  17. #1417
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    Going to pull the trigger on a Mastodon Pro Ext for my medium Scott Big Jon tomorrow. Mostly winter riding with post holes 100mm or 120mm? Thanks

  18. #1418
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    I have a 120 Mastodon STD PRO in very good condition, low miles, uncut steerer! Steerer has never come loose

    PM me

    SOLD!
    Last edited by mikeetheviking; 11-28-2018 at 10:53 AM. Reason: sold

  19. #1419
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    Quote Originally Posted by mikeetheviking View Post
    I have a 120 Mastodon STD PRO in very good condition, low miles, uncut steerer! Steerer has never come loose

    PM me

    asking $450.00
    That's a great deal. If I was l was Lookbiker, or if I had not bought one 2 months ago, I would be all over that. With all the variations Manitou makes, the 120 STD seems to be adjustable enough to work for 95% of people.

  20. #1420
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    I donít want to deal with spacers for the wider tires so going with Extended version from the start

  21. #1421
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    Quote Originally Posted by GspotRider View Post
    Small Wozo frame has clearance issue with knob. A light grind of the black knob could prevent a bent adjuster shaft.

    Should i leave it? Should I grind it?

    Other Questions:
    Mine gets 110mm travel. Is the new bottom out bumper available from Manitou?
    Is it easy to install?

    What are you guys preferring: slow rebound to handle drops, jumps and chunky stuff or fast rebound to get it active for high speed runs?

    Untitled by avyoung, on Flickr
    Sent you PM also. Looking at a small 2017 and want to put on the mastadon. Did the thicker race work for you? Thanks.
    Dash Pt. State Park (Tacoma), Big Sky Montana during Snowboard Season, Duluth Mn, a couple of times of year incl. Xmas.

  22. #1422
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    Found another Wozo 2017 brand new in the shop. Made the deal on the bike and traded in the Bluto, got a Mastodon 120mm Comp EXT. The bigger Crown Race will be installed.

    Rode the 2019 Wozo for a test ride to see what the Mastodon would do. Far better than I thought possible.
    Dash Pt. State Park (Tacoma), Big Sky Montana during Snowboard Season, Duluth Mn, a couple of times of year incl. Xmas.

  23. #1423
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    Hi Bumpyride,

    The taller crown race takes care of the clearance issues on the small wozo. I have been running 140mm travel for a year now. I think I will pull it apart and set it to 150mm instead. Bike rides great with the mastodon. Enjoy your new ride!

    Quote Originally Posted by Bumpyride View Post
    Found another Wozo 2017 brand new in the shop. Made the deal on the bike and traded in the Bluto, got a Mastodon 120mm Comp EXT. The bigger Crown Race will be installed.

    Rode the 2019 Wozo for a test ride to see what the Mastodon would do. Far better than I thought possible.

  24. #1424
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    Quote Originally Posted by GspotRider View Post
    Hi Bumpyride,

    The taller crown race takes care of the clearance issues on the small wozo. I have been running 140mm travel for a year now. I think I will pull it apart and set it to 150mm instead. Bike rides great with the mastodon. Enjoy your new ride!
    Thanks. Reading through this whole thread helped me not make a mistake. Your 2017 small picture kind of sealed the deal. I looked at the 2019 and it was not the bike I wanted. It was, however, pretty insightful to ride the 2019 with the Mastodon and see what a difference in the ride it made.
    Dash Pt. State Park (Tacoma), Big Sky Montana during Snowboard Season, Duluth Mn, a couple of times of year incl. Xmas.

  25. #1425
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    Quote Originally Posted by Dougal View Post
    The EXT has longer internal shafts and cannot be lowered as far as the STD.

    The STD with spacers can do the same tyre size as the EXT, but loses 20mm of travel due to the shorter rods internally.
    The STD with spacers is 5.25" max tyres and 130mm max travel.
    The EXT can do 5.25" max tyres with 150mm max travel.
    I have been too busy to thank for the recommendations here, sorry for late reply!

    For me it needs to be a EXT, with pictures with spikes hitting the crown on the STD, it seems not possible to use STD.
    Since I am going to use a 120mm travel fork for the Pole Taiga, with the largest diameter tires out there in 27.5"x 4,5 including studs. Bontrager Barb and GnarWhale. Want also to have the Cake Eater 4.5 that is the same diameter as the 2XL Vee.

    So for me the choice of EXT/STD should not do any difference of AC since a modified STD will have same AC like EXT. STD AC length with 120mm travel will be 20mm+20mm= +40mm minus 20mm less AC length, AC length as exactly like EXT.

  26. #1426
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    Quote Originally Posted by Rumblefish2010 View Post
    I have been too busy to thank for the recommendations here, sorry for late reply!

    For me it needs to be a EXT, with pictures with spikes hitting the crown on the STD, it seems not possible to use STD.
    Since I am going to use a 120mm travel fork for the Pole Taiga, with the largest diameter tires out there in 27.5"x 4,5 including studs. Bontrager Barb and GnarWhale. Want also to have the Cake Eater 4.5 that is the same diameter as the 2XL Vee.

    So for me the choice of EXT/STD should not do any difference of AC since a modified STD will have same AC like EXT. STD AC length with 120mm travel will be 20mm+20mm= +40mm minus 20mm less AC length, AC length as exactly like EXT.
    The addition of spacers in the STD will stop the spikes hitting the crown. With 2x10mm spacers in each side it has the same clearance as the EXT.

    A-C will be dictated by clearance and travel.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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  27. #1427
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    Quote Originally Posted by Dougal View Post
    The addition of spacers in the STD will stop the spikes hitting the crown. With 2x10mm spacers in each side it has the same clearance as the EXT.

    A-C will be dictated by clearance and travel.
    Yes so my calculation is for a STD fork:
    Increased clearance +20mm
    Reduced travel -20mm (from 120 to 100mm
    Increased travel +20mm
    =Total increased AC lengt +20mm

    Is that not exactly the difference in EXT and STD AC length?

  28. #1428
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    So.....now that my mastodon has been sold, I figured I would take a moment here to share some thoughts

    I ran a pro std 120 in 29+ mode with no internal mods on a FS Waltworks

    Just wanted to say that I loved the fork and HIGHLY recommend it if you are in the market for a fat fork.

    It never felt heavy, I could lift it and wheelie with ease. And it behaved like any fine piece of equipment should.

    Just get one!

  29. #1429
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    I read that there's a new Mastodon Pro with IRT but don't see anyone selling it yet. I wonder will Manitou sell IRT upgrade separately?

  30. #1430
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    Quote Originally Posted by Mebaru View Post
    I read that there's a new Mastodon Pro with IRT but don't see anyone selling it yet. I wonder will Manitou sell IRT upgrade separately?
    The IRT unit is sold separately, so just buy it and put it on the fork. It is around 60USD.

  31. #1431
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    Quote Originally Posted by Rumblefish2010 View Post
    The IRT unit is sold separately, so just buy it and put it on the fork. It is around 60USD.
    As far as I know earlier IRT was sold only for Mattoc forks. I have contacted Manitou a year ago if I can put IRT into my Mastodon and they replied they aren't compatible.

  32. #1432
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    Iím running an IRT in both of my Mastodon forks as well as my Mattoc. I love the tuning options and the benefits to both are similar. They are definitely compatible. Itís odd Manitou would say itís not, maybe the CS did not know when the Mastodon first came out?

  33. #1433
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    Quote Originally Posted by Aresab View Post
    Iím running an IRT in both of my Mastodon forks as well as my Mattoc. I love the tuning options and the benefits to both are similar. They are definitely compatible. Itís odd Manitou would say itís not, maybe the CS did not know when the Mastodon first came out?
    I have used on three different Mastodon forks, so that is wrong. They fit. It is the IRT for Mattoc Expert, you can see it here:
    https://www.bike24.com/p2172736.html?q=irt

    You will even see en the bottom of these page on Manitou site, that it is Setup guide for Mattoc and Mastodon.
    https://manitoumtb.com/product/mrd-irt/?cat_id=26

  34. #1434
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    Ok, great. So you guys can confirm that Mattoc IRT can be installed ninto Mastodon Pro fork?

  35. #1435
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    Quote Originally Posted by Mebaru View Post
    Ok, great. So you guys can confirm that Mattoc IRT can be installed ninto Mastodon Pro fork?
    Check here it says "Mattoc/Mastodon IRT Set-up Guide" on the IRT web page for Manitou, so yes for the secon time I can confirm that is possible to install it and I have done so for 3 different Mastodon Pro forks.

    See link https://manitoumtb.com/product/mrd-irt/?cat_id=26

  36. #1436
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    Quote Originally Posted by Rumblefish2010 View Post
    Check here it says "Mattoc/Mastodon IRT Set-up Guide" on the IRT web page for Manitou, so yes for the secon time I can confirm that is possible to install it and I have done so for 3 different Mastodon Pro forks.

    See link https://manitoumtb.com/product/mrd-irt/?cat_id=26
    Ok, thanks.

    They have updated their website recently. Previously, there was no mention about Mastodon forks. In the product description it still doesn't have Mastodon listed: " This tool is compatible with the following fork models: ē Mattoc Pro 2 ē Mattoc Pro ē Mattoc Expert ē Doradro Pro ē Dorado Expert Trail"

    Yeah, I know that Mastodon is basically is fat version of Mattoc 2 fork...

  37. #1437
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    Regarding IRT. There are two different stanchion internal diameters.

    Pro models and Comp models. Comp models are smaller ID due to thicker stanchion walls due to softer 6000 series aluminium stanchions.

    Mattoc Pro & Expert used the same stanchions with same ID since the start and IRT screws straight into those.

    I have not yet tried to fit IRT into a Mastodon. I would try it but I'm currently out of Mastodon stock. Given @Rumblefish2010 and @Aresab have run it, it is clear they fit and work.

    Standard caution for IRT: Make sure the shaft is greased during install, or the seal inside the IRT piston wears out quickly.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
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  38. #1438
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    Has anyone found a tool-less axle setup for the Mastadon?

    ac

  39. #1439
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    Anyone else have a problem setting the SAG on an EXT Comp model. Was really hard to fine tune. Finally got it to about 20%, but it took about 20 times with the fork pump to get it there.
    Dash Pt. State Park (Tacoma), Big Sky Montana during Snowboard Season, Duluth Mn, a couple of times of year incl. Xmas.

  40. #1440
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    Quote Originally Posted by avc8130 View Post
    Has anyone found a tool-less axle setup for the Mastadon?

    ac
    since the mastodon axle is a proprietary design, you will have to go custom if yoou want a tool less front axle.

  41. #1441
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    Quote Originally Posted by Dougal View Post
    Regarding IRT. There are two different stanchion internal diameters.

    Pro models and Comp models. Comp models are smaller ID due to thicker stanchion walls due to softer 6000 series aluminium stanchions.

    Mattoc Pro & Expert used the same stanchions with same ID since the start and IRT screws straight into those.

    I have not yet tried to fit IRT into a Mastodon. I would try it but I'm currently out of Mastodon stock. Given @Rumblefish2010 and @Aresab have run it, it is clear they fit and work.

    Standard caution for IRT: Make sure the shaft is greased during install, or the seal inside the IRT piston wears out quickly.
    I had an IRT installed on my Mastodon Comp by the swedish dealer. It took me a long time to understand that the extra chamber was leaking into the main positive chamber. The guy had swapped the lower piston to one of an IVA which should in theory work since both shafts are 10mm but it doesn't...

  42. #1442
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    My Mastodon has a click noise on the rebound stroke, it is not at top out but just when the fork changes direction from compression to rebound. Any idea what it could originate from?

  43. #1443
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    Quote Originally Posted by HappyMTB.fr View Post
    My Mastodon has a click noise on the rebound stroke, it is not at top out but just when the fork changes direction from compression to rebound. Any idea what it could originate from?
    Have you checked the oil level? Might be the cause. My mechanic said it is very sensitive to the exact volume of oil and that he had to do a quick adjustment to most of the Mastodons that they've sold.

  44. #1444
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    Thanks @canmoreBruce!
    I will check that

  45. #1445
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    Does a carbon Farley require a spacer or different adjuster nob to clear the non pro mastodon? Thanks

  46. #1446
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    Quote Originally Posted by Saskrider View Post
    Does a carbon Farley require a spacer or different adjuster nob to clear the non pro mastodon? Thanks
    Mine did. About a 3mm spacer below the crown race.

  47. #1447
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    Quote Originally Posted by Hobine View Post
    Mine did. About a 3mm spacer below the crown race.
    Thanks! Which spacer did you use that's compatible with the factory headset

  48. #1448
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    Can anyone confirm if swapping for the circus adjuster allows the mastodon to clear a carbon Farley frame? Heard it once on this thread to clear a different bike and no one has mentioned it since. Thanks

  49. #1449
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    Quote Originally Posted by Saskrider View Post
    Thanks! Which spacer did you use that's compatible with the factory headset
    I had some bottom bracket spacers on hand that were the correct size. I believe they are BB30.

  50. #1450
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    Quote Originally Posted by Saskrider View Post
    Thanks! Which spacer did you use that's compatible with the factory headset
    You can try one of these:

    Cane Creek 40-series crown race (52/40) steel, 1.5" (+6mm)

    They also make it in 3mm
    RICOH for LIFE
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  51. #1451
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    This one comes in whatever size you need.

    https://www.mtbtools.com/product/ext...ork-clearance/


    Sent from my SM-G960U1 using Tapatalk

  52. #1452
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    Quote Originally Posted by CanmoreBruce View Post
    Have you checked the oil level? Might be the cause. My mechanic said it is very sensitive to the exact volume of oil and that he had to do a quick adjustment to most of the Mastodons that they've sold.
    You were bang on! My oil level was 10mm too low. Thanks again!

  53. #1453
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    Quote Originally Posted by akgrimace View Post
    This one comes in whatever size you need.

    https://www.mtbtools.com/product/ext...ork-clearance/


    Sent from my SM-G960U1 using Tapatalk
    Thank you, you dont happen to know how many mm I need to clear a large carbon Farley frame?

  54. #1454
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    Quote Originally Posted by majack View Post
    You can try one of these:

    Cane Creek 40-series crown race (52/40) steel, 1.5" (+6mm)

    They also make it in 3mm
    Pretty sure I just need a 3mm on a large carbon farley, can you confirm? Thanks

  55. #1455
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    Quote Originally Posted by Saskrider View Post
    Thank you, you dont happen to know how many mm I need to clear a large carbon Farley frame?
    I have a different frame. Once I had the fork, I mocked it up, measured, and had the spacer a week later.

    Sent from my SM-G960U1 using Tapatalk

  56. #1456
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    Quote Originally Posted by akgrimace View Post
    I have a different frame. Once I had the fork, I mocked it up, measured, and had the spacer a week later.

    Sent from my SM-G960U1 using Tapatalk
    I agree that's the best way but ill be waiting 3+ weeks for q part like that in Canada so going to confirm so I can have it waiting for the fork thanks

  57. #1457
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    At the bottom of this really long webpage is a procedure for measuring your frame.

    https://www.ridefatbikes.ca/2018-fat...-fork-shootout


    Sent from my SM-G960U1 using Tapatalk

  58. #1458
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    ^before I go measuring: I suspect that a 2016 Salsa Mukluk frame (size XL) does not clear the Mastodon fork. Could someone prove me wrong

  59. #1459
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    Mastodon Pro STD 120mm on my 2015 Salsa Beargrease 2 (aluminum).

    Fits perfectly, clears the downtube with ease. Makes for a pretty slack bike. Riding impressions soon.


  60. #1460
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    Quote Originally Posted by FireinMTB View Post
    Mastodon Pro STD 120mm on my 2015 Salsa Beargrease 2 (aluminum).

    Fits perfectly, clears the downtube with ease. Makes for a pretty slack bike. Riding impressions soon.

    Looks good. And I agree that is fixes the geo a bit!

  61. #1461
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    Just received a Mastodon Pro 120 Ext from CRC for my Voytek. Looking forward to seeing how it changes the ride. Also considering experimenting with 27.5 Fat.

    Currently running the Otso rigid carbon fork.

  62. #1462
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    Quote Originally Posted by kyttyra View Post
    ^before I go measuring: I suspect that a 2016 Salsa Mukluk frame (size XL) does not clear the Mastodon fork. Could someone prove me wrong
    No clearance issues on my 2018 XL carbon frame. I think thatís the same Mukluk design as 2016...I think...???

  63. #1463
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    Quote Originally Posted by carbine_275 View Post
    Just received a Mastodon Pro 120 Ext from CRC for my Voytek. Looking forward to seeing how it changes the ride. Also considering experimenting with 27.5 Fat.

    Currently running the Otso rigid carbon fork.
    I like mine on my Voytek. I went with the Std. It clears 29+ just fine. No plans yet for B-Fat. I have too much invested in 26 tires and wheels.

  64. #1464
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    Quote Originally Posted by bikedrd View Post
    Looks good. And I agree that is fixes the geo a bit!
    Thanks man. By my calculations it should put the head angle in the 67.5 range, considering with a 100mm bluto (sagged) it's supposed to be at 68.5.

    Also makes the rear end feel shorter making it super easy to pop into a manual now, and raises the BB height which was a touch low for trail riding.

    win/win/win and this is now my favorite trail bike. It just friggin' eats everything, and the handling is much improved over the rigid setup.

    very happy with this. If you are on the fence about this fork, just get one, you won't be disappointed.

  65. #1465
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    So guys, I've been riding faster than last year when I got this beast and I need to make the suspension more progressive. Am I correct that removing the spacers from the bottom of the IVA and putting them on top will achieve this? I'm running the 100mm Pro Ext, so it came with 2 on top and 2 below. I moved one (more) above for now and pumped the fork up to the same pressure. Quick ride in the driveway didn't show much difference but I haven't had time to dial it in yet. I had two harsh bottom outs on landings on Monday and so I'm looking to tweak the performance.

  66. #1466
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    Can a 203mm rotor be fitted to this fork? I know it will need a spacer but I can't find a maximum size listed, I've emailed Hayes but have had no reply. TIA

    EDIT - found it!
    Attached Thumbnails Attached Thumbnails Manitou Mastodon?-capture.jpg  

    What a perfect waste of time

  67. #1467
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    Quote Originally Posted by JackWare View Post
    Can a 203mm rotor be fitted to this fork? I know it will need a spacer but I can't find a maximum size listed, I've emailed Hayes but have had no reply. TIA
    Yes, you can with adapter. I have 203mm rotor on my Mastodon Pro.

  68. #1468
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    For Info;

    To change from a Mastodon Comp from 120mm to 140mm you don't need the large 24mm socket, thin walled 8mm long socket or the cut cassette tool.

    The official guide is very good and Hayes have published lots of info but I found that a standard Unior 1670.5/4 cassette tool slides over the air spring shaft perfectly once you've removed the lower spacer(s) as shown below.

    I left the forks on the bike and simply inverted the bike and wrapped a lot of old cloths around the top (now bottom) of the forks to catch the oil as I slide the lowers off.

    I undid the air valve side using a standard 8mm socket to begin with and then a 4mm allen key gently pressed in the the valve head (which is an internal hex).

    Once the spacers have been removed as per the instructions, the fork lowers slid back on and oil added, the only fiddly part was starting the thread again on the air value side, as using the allen key initially isn't possible as you release the air pressure. I used a pair or pliers to gently grip the thread and turn through 180' - just enough for the thread to engage and allow the use of the allen key to tighten it.

    A pair of adjustable grips was used to loosen the IVA and then it can be unscrewed by hand, (while the system is depressurized).

    When moving the spacer in the IVA beware of the two very thin washers below piston and ensure they don't get trapped and distorted when adding the spacer below it.

    A good evening's work (and a lot cheaper than I'd initially expected).

    For info the Mastodon docs are here;


    https://manitoumtb.com/wp-content/up...vice-Guide.pdf

    https://manitoumtb.com/wp-content/up...ange-Guide.pdf

    https://manitoumtb.com/wp-content/up...etup-Guide.pdf
    Attached Thumbnails Attached Thumbnails Manitou Mastodon?-img_20190703_205255.jpg  

    Last edited by JackWare; 07-12-2019 at 04:11 AM.
    What a perfect waste of time

  69. #1469
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    I need help with my new fork. I got the 120mm std Comp version and the shop set the sag up for me, however since Iím heavy (365lbs] I was only able to have them get me around 33-35% sag with stock fork settings. They ended up inflating the fork to 150psi although the max pressure is 120psi.

    I played with more settings including maxing the rebound and changing the IVA from 1 spacer above, 3 below to all 4 above to hopefully make the fork more progressive. When I reinflated the fork I didnít go past max psi and as a result I didnít notice much decrease in sag.

    Wanted to get some recommendations on where I should be going to hopefully dial this fork in better for my weight.

  70. #1470
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    Have you reached out to Manitou?
    Jason
    Disclaimer: www.paramountfargo.com

  71. #1471
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    Quote Originally Posted by JAGI410 View Post
    Have you reached out to Manitou?
    Nope. Only had the bike with the fork installed for a day. Plus Iím now just assuming itís one of those things where Iím just too heavy and the fork wasnít specifically rated for my weight anyway so Iím SOL on that end.

  72. #1472
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    Mastodon COMP will fit the IRT unit BUT you have to swap the pistons first. Basically you put the IVA unit black piston onto the IRT unit assembly reassemble screw into fork.
    Last edited by Phiu-x; 07-24-2019 at 10:26 AM. Reason: info

  73. #1473
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    Quote Originally Posted by Mebaru View Post
    Ok, great. So you guys can confirm that Mattoc IRT can be installed ninto Mastodon Pro fork?
    Mastodon COMP : Yes but has to swap piston and use the black one from the IVA unit.
    Mastodon PRO: Direct fit.

  74. #1474
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    Quote Originally Posted by HappyMTB.fr View Post
    I had an IRT installed on my Mastodon Comp by the swedish dealer. It took me a long time to understand that the extra chamber was leaking into the main positive chamber. The guy had swapped the lower piston to one of an IVA which should in theory work since both shafts are 10mm but it doesn't...
    Quote Originally Posted by Phiu-x View Post
    Mastodon COMP : Yes but has to swap piston and use the black one from the IVA unit.
    Mastodon PRO: Direct fit.
    So you haven't experienced the same issue as HappyMTB whose dealer did the same conversion?
    What a perfect waste of time

  75. #1475
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    Two things to note:

    1. If you install an IRT system without greasing the shaft, it wears out the oring inside the piston very quickly. Result is leaks from the IRT chamber to main chamber.

    2. Static seals can have very different crush requirements to dynamic seals. I haven't checked the IVA pistons to see if the seal groove dimensions are suitable for a moving seal.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
    www.dougal.co.nz

  76. #1476
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    I put a major amount of grease onto the shaft , piston and thread of the IRT unit as per manufacturer advice before installing it. After 2 days riding it I don't have any leak... that I can feel .. yet. I will keep an eye out for this particular problem ans post here if any issue arise with this mod.

  77. #1477
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    All I can say is that I pumped IRT from 100 up to 200 psi and the spring effect is there this piston keeping air and moving.But thanks, I will keep an eye out for this.

  78. #1478
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    Had the Pro extended out to 140mm.Doesnt change the ride or handling,but nice to have a bit of extra squish when the trails are rough.Rode a downhill trail last week and it handled very wellManitou Mastodon?-68878111_10156334946407401_5373202115353116672_n.jpg

  79. #1479
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    @bikemad1

    Where did you get the kashima-coating ?

    Regards

    Christian

  80. #1480
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    Quote Originally Posted by KTMNealio View Post
    It's a motobecane frame. But I greased the ends of the hub and torqued the axle down and it quit making that noise.
    Same issue different bike. Same fix. Thanks.


    Sent from my SM-G960U1 using Tapatalk

  81. #1481
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    Quote Originally Posted by ChristianNO View Post
    @bikemad1

    Where did you get the kashima-coating ?

    Regards

    Christian
    That's not Kashima(tm) it's natural coloured hard anodising. It's what almost all stanchions were before fashion dictated they be dyed black during anodising.

    That will be an OEM spec fork as all aftermarket Mastodon's have black stanchions.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
    www.dougal.co.nz

  82. #1482
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    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
    www.dougal.co.nz

  83. #1483
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    Hi

    Where is it possible to buy the Mastodon Pro Ext with 150mm Travel ??

    Regards

    Christian

  84. #1484
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    Quote Originally Posted by Dougal View Post
    Is that the lucrative 1 1/8" steerer CSU I've read about?!?! tempting option for silly Pugsley owners like myself.
    Silly bike things happening.

  85. #1485
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    Quote Originally Posted by Redlands R&C View Post
    Is that the lucrative 1 1/8" steerer CSU I've read about?!?! tempting option for silly Pugsley owners like myself.
    Yep, we're doing them as a custom build option.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
    www.dougal.co.nz

  86. #1486
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    So I just had mine serviced.The suspension dude used fox 34 2019 seals-and the fork feels better than when I first got it!

  87. #1487
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    Quote Originally Posted by bikemad1 View Post
    So I just had mine serviced.The suspension dude used fox 34 2019 seals-and the fork feels better than when I first got it!
    They're a downgrade in friction over the stock seals. Especially in the cold. The fork will feel better now because it's broken in and recently serviced.

    The SKF green seals are better than the Fox SKF. The stock Mastodon seals are better again.
    Owner of www.shockcraft.co.nz, Mech Engineer, Tuner, Manitou, Motorex, Vorsprung EPTC, SKF, Enduro
    www.dougal.co.nz

  88. #1488
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    Quote Originally Posted by ChristianNO View Post
    Hi

    Where is it possible to buy the Mastodon Pro Ext with 150mm Travel ??

    Regards

    Christian
    They only come on OEM bikes so maybe a used take off.....? However I haven't every seen one for sale. Another option you know may or may not know about is the 120mm version is easy to change the travel to 140mm. Google it if your unfamiliar with this option.

    Sent from my SAMSUNG-SM-N915A using Tapatalk
    Last edited by bplaizier; 2 Weeks Ago at 06:20 AM.

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