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  1. #1
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    Another SRAM XX1 question for fatties

    Didn't want to hijack that last thread, so here goes.

    Want to run SRAM XX1 on a new fat-and-squishy build (likely a NAHBS bike). Don't want to run 1x9 or 1x10.
    Questions:
    1. Sram obviously doesn't have a fat crankset, so I would have to put the spider on another crankset. Are there any fat cranksets that will accept a SRAM spider/chainring? Middleburn isn't compatible as far as I know. If worst comes to worst will have to run a normal chainring, but their chainring is attractive since it has the chain-retaining teeth that obviate the need for a chainguide. Unfortunately their chainrings have a funky BCD that is specific to their chainrings. My other option might be to talk with homebrewed components to make a spider for me...

    2. Are there any 170mm rear hubs that will accept the new SRAM XD freehub body (SRAM XD Driver Body) ? It is supposed to be compatible with mavic and DT swiss. Will any of the 170mm rear hubs take a mavic or DT swiss freehub body? If so, I think that would work.

    Thanks in advance for advice. Already starting to think about the build 6 months out...

  2. #2
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    Hope XX1 driver

    2013 Hope XD Freehub for SRAM XX1 - New Mountain Bike Components at Eurobike 2012 - Mountain Biking Pictures - Vital MTB

    Has anyone seen this news? It appears Hope will have a XX1 driver body that will fit their FatSno hubs. I think XX1 has the potential to be very good on the fatbike since no FD issues. And, it's quite light.

  3. #3
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    The issue with fatbikes is tyre clearance of the chain in granny gear and 100mm cranks/BB choice with proprietary components. The whole magic of XX1 is the massive granny.... no use if your chain is caught up on the tyre.

    At the price of a complete Salsa or Surly bike i dont reckon there many here going to rush out to but a light gear system for a 30lb bike when it might not work..... Guinea pig needed

    Info on these 2 threads already.

    Here
    Here
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  4. #4
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    10-42 cassette as opposed to 11-36 though. So for those commited to running a 1x set-up because of clearance issues, or a desire for simplicity. Its a big improvement in range.

    Too rich for me though.
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  5. #5
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    My local shop is pretty cluey and they say it can't be done.. Bugger!

    DJ

  6. #6
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    Quote Originally Posted by DavidJohn View Post
    My local shop is pretty cluey and they say it can't be done.. Bugger!

    DJ
    If the Hope Tech free hub convertor works with the FatSno rear hub. Which I reckon it should. Then why not?

    Is there a reason you have to use the XX1 crankset? cant you just replace it with the 100mm BB shell compatible cranks of your chioce
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  7. #7
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    Ive just put 1 x 10spd on my new bike and its still $250 for an XO level cassette... its been out a couple of years too and thats not even the top XX..... XX1 will be a re-mortgage
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  8. #8
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    I have an XO rear mech, an XTR 11-36 cassette, a XTR chain, and a Raceface crankset with Homebrewed 31T chainring. Ready for my bike. All picked up from clearance sales. At the moment 10 speed is just easier to find cheap, and thus easier to replace.

    But soon......

    I run 11 speed Campag SR on the road bike, with a Rotor crankset + chainrings. So I'm happy running a 11 speed drivechain with 10 speed cranks. Works brilliantly. There could be issues using a standard 3/32 single speed chainring perhaps. But I struggle to believe a 10 speed chainring would'nt work. Theoretically more likely to through a chain maybe. But thats what chain keepers are for.
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  9. #9
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    I'm going overseas for a few months, but if this thread is still rolling in January - I'm gonna be the Guinea Pig...

    Can always put the XX1 on a Spearfish if it doesn't work on my fattie....

  10. #10
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    I cant see the issue with the chainring either. Might be offset ? I run a 30t HBC ring one my 1 x 10.
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  11. #11
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    Quote Originally Posted by ozzybmx View Post
    I cant see the issue with the chainring either. Might be offset ? I run a 30t HBC ring one my 1 x 10.
    I assume the chain is narrow, much like my 11 speed KMC road chain. I'm tempted to try and wrap that around my HBC singlespeed chainring now. Could be an expensive experiment if it works though. My gut says its wont quite fit.
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  12. #12
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    The only reason was the long teeth of the 11spd stopped the chain fall off without a guard ???
    Attached Thumbnails Attached Thumbnails Another SRAM XX1 question for fatties-sram-xx1-1x11-mtb-crankset-details05.jpg  

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  13. #13
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    Wow. Them be some long teeth!

    Is that because the cassette wider than a 10 speed?
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  14. #14
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    I believe its because of there is no chainguard needed.
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  15. #15
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    So add chain device to fat crankset with chainrings removed to leave one = job jobbed.
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  16. #16
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    The key word was "fatbike", no REAL weight weenies in this club.
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  17. #17
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    but plenty of weeenies

  18. #18
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    Hate to say it but plenty of weight weenies here (myself included) bragging about their 26# bikes. We are nicely offset by those who brag about their 50# bikes. It's all good, but 50# seriously?
    Latitude 61

  19. #19
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    Quote Originally Posted by sryanak View Post
    Hate to say it but plenty of weight weenies here (myself included) bragging about their 26# bikes. We are nicely offset by those who brag about their 50# bikes. It's all good, but 50# seriously?
    guilty as well since i chose the parts and factored in weight while doing so...

  20. #20
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    Quote Originally Posted by Smallfurry View Post
    If the Hope Tech free hub convertor works with the FatSno rear hub. Which I reckon it should. Then why not?

    Is there a reason you have to use the XX1 crankset? cant you just replace it with the 100mm BB shell compatible cranks of your chioce
    I asked all those questions.. Maybe they were too quick to throw it in the too hard basket.. I used to race mt bikes and train with the top SRAM guy here so I might have to chase him up and run it by him.

    DJ

  21. #21
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    Hopefully i'll be the guinea pig with some cool results this coming february. With 170mm hub and 145mm bb spindle, there shouldnt be any tire/chain issues. The next issue is the proprietary spider snd chainring (since that's part of the magic). I think this can be solved with a custom bb30 spindle.

  22. #22
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    Weight is even more important on fat bikes because the wheels/tires wide hubs and cranks are weight that you can't do much about. So making up for it other places is key.

    The XX1 rings aren't just long but have odd shaped teeth that grab the chain. Like others have pointed out there is no reason you couldn't run any crankset you want that gives you the right gearing along with a guide system. XX1 rings are probably better but not required.

    Will the Hope conversion be offered in 170mm? If not then that is the stumbling block because the XX1 cassette will only fit dedicated hubs.
    Attached Thumbnails Attached Thumbnails Another SRAM XX1 question for fatties-xx1_chainring.jpg  

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  23. #23
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    Hope's Xd driver is supposed to fit all Pro2 Evo and Pro 3 models. Fatsno is a Pro2 Evo model.

  24. #24
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    Quote Originally Posted by noish View Post
    Hope's Xd driver is supposed to fit all Pro2 Evo and Pro 3 models. Fatsno is a Pro2 Evo model.
    This^

    I have both a standard Pro2, and a Fatsno. The innerds look identical to my, admittedly non-expert, eye.

    Personally, from what I've read here, I'd look to use the XX1 chainring. But if the BCD is odd. Thats going to be tricky. Plenty of folk, on this very forum, have shown ingenuity to get around bigger issues, in the name of the fat.

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  25. #25
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    Leonardi Racing, in Italy, makes 11 or 12-40 cassettes...

  26. #26
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    OK...so how does it work? It doesn't really look like standard splines.

    And what is the difference between the 25-29 and the 34-40? Or did they just upload the wrong pictures?
    Attached Thumbnails Attached Thumbnails Another SRAM XX1 question for fatties-leonardi-generale-lee-25-29.jpg  

    Another SRAM XX1 question for fatties-leonardi-generale-lee-34-40.jpg  

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  27. #27
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    Quote Originally Posted by modifier View Post
    OK...so how does it work? It doesn't really look like standard splines.

    And what is the difference between the 25-29 and the 34-40? Or did they just upload the wrong pictures?
    I think there is a mistake on the site description. It just replaces the last 4 cogs from the sram cassette. There is a shimano version coming out soon, where the largest is 42 (just replaces the last 3 cogs). I have seen it in person and it is well made. It is a little expensive but a great option for 1x10.

  28. #28
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    I9 now has a xx1 cassette body that will work on the paul 170 hub.

  29. #29
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    Does anyone have more detail on the Italian option pictured above? I went to their site but can't seem to find any info. Price, contact info.....derailleur mods necessary?

    Thanks,

    BB
    www.thepathbikeshop.com

  30. #30
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    leonardi do a lot of cannondale type stuff...they also do a fairly mad fork that uses a rear shock and a parallelogram linkage type of thing. its called an alike. darren crisp has some info re visiting leonardi on his blog...nice set up they have! theres a contact form here (with phone number underneath)
    http://www.leonardiracing.it/contattaci.html
    if it helps?

  31. #31
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    Quote Originally Posted by donkey View Post
    Does anyone have more detail on the Italian option pictured above? I went to their site but can't seem to find any info. Price, contact info.....derailleur mods necessary?

    Thanks,

    BB
    I spoke to the leonardi rep at a bike show. As I wrote above, the part just replaces the last 4 of SRAM cassettes. Just plug and play, no mods are required. The shimano version replaces the last three cogs (largest 42) and it will be plug and play also. It is made specifically for 1x10 set ups. It seems pretty easy, straightforward.
    Last edited by Machianera; 10-04-2012 at 02:57 PM.

  32. #32
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    Quote Originally Posted by Machianera View Post
    I spoke to the leonardi rep at a bike show. As I wrote above, the part just replaces the last 4 of SRAM cassettes. Just plug and play, no mods are required. The shimano version replaces the last three cogs (largest 42) and it will be plug and play also. It is made specifically for 1x10 set ups. If you have a very large ring in the front, be sure the derailleur can handle it. It seems pretty easy, straightforward.
    It's hard to believe that the derailleur won't need any mods in order for the pulley to clear a 42t cog. I'd definitely want to see it in action before I purchased one.

    Anyone actually installed/used one of these?

    BB
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    Quote Originally Posted by dRjOn View Post
    leonardi do a lot of cannondale type stuff...they also do a fairly mad fork that uses a rear shock and a parallelogram linkage type of thing. its called an alike. darren crisp has some info re visiting leonardi on his blog...nice set up they have! theres a contact form here (with phone number underneath)
    .: LEONARDI RACING - Il Primo Cannondale Store Europeo
    if it helps?
    Crisp and leonardi shared the same booth at the Padua show. It seems a relationship with mutual benefits. One of the bikes was assembled with the general lee cassette, leo cranks and those German hydraulic derailleurs.

  34. #34
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    Quote Originally Posted by donkey View Post
    It's hard to believe that the derailleur won't need any mods in order for the pulley to clear a 42t cog. I'd definitely want to see it in action before I purchased one.

    Anyone actually installed/used one of these?

    BB
    It can run 1x10 with a long cage derailleur. I don't get what is the problem. Look at the math.

  35. #35
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    Quote Originally Posted by Machianera View Post
    It can run 1x10 with a long cage derailleur. I don't get what is the problem. Look at the math.
    The problem is that you're asking a derailleur that is designed for a 36t cog to shift into a 42t cog. That's a big difference.

    Try putting an 11-36 cassette on a bike with a road rear derailleur and you'll see what I'm talking about.

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  36. #36
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    Planning to give this a go... challenging part (as discussed) is the crank option. I'll run the XD driver on the Hope hubs and then probably use an e13 double but just running the middle ring. the smallest chainring you can get for a std singlespeed 104 BCD is 32t and I don't think thats quite low enough to crawl - prob want to run a 28 or so? Plan will be to use an e13 double with just the inner ring.

    Without the special XX1 teeth I'll need to run a chain keeper of some description but it should work out ok...

  37. #37
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    You can get a 31t on a 104. But it may take a little filing of the spider. I just finished removing a little material off a Raceface to fit a 31t homebrewed chainring.
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  38. #38
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    you can also get 30T on 104 - Andersen Machine does them. I've had both the SS and geared versions - they work great.

  39. #39
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    Quote Originally Posted by Pizzaz View Post
    Planning to give this a go... challenging part (as discussed) is the crank option. I'll run the XD driver on the Hope hubs and then probably use an e13 double but just running the middle ring. the smallest chainring you can get for a std singlespeed 104 BCD is 32t and I don't think thats quite low enough to crawl - prob want to run a 28 or so? Plan will be to use an e13 double with just the inner ring.

    Without the special XX1 teeth I'll need to run a chain keeper of some description but it should work out ok...
    Not sure if this link will work Xx1. so I'll spam you guys with my photos again. Let me know if something like this would help you Pizzaz -- you can run the 28T XX1 ring no problem. I can say for sure you will not regret running XX1 on a fatbike!
    Attached Thumbnails Attached Thumbnails Another SRAM XX1 question for fatties-img_0861-mtbr.jpg  

    Another SRAM XX1 question for fatties-img_0876-mtbr.jpg  


  40. #40
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    Quote Originally Posted by WolfTooth View Post
    Not sure if this link will work so I'll spam you guys with my photos again. Let me know if something like this would help you Pizzaz -- you can run the 28T XX1 ring no problem. I can say for sure you will not regret running XX1 on a fatbike!
    Just two questions 1:who made it and 2: is there enough room for a bash? yea i know why a bash belive me where i live you need one.

  41. #41
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    Quote Originally Posted by pt81 View Post
    Just two questions 1:who made it and 2: is there enough room for a bash? yea i know why a bash belive me where i live you need one.
    My company, Wolf Tooth Components, made it but I am now making full chainrings so you can use a bash for sure. I will soon have these chainrings for sale to fit many popular crank arm interfaces. Note that the best part (my opinion) is that these chainrings work GREAT with 1x10 and SRAM Type 2 or Shadow Plus (clutch-type) derailleurs!
    You can learn more about my company and products here:
    wolftoothcomponents.com

  42. #42
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    Thanks WolfTooth. I'ii go and take a look on your site. p.s. theres no problemes for sending to France?

  43. #43
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    Are you going to make a spiderless E13?

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    Quote Originally Posted by modifier View Post
    what is the difference between the 25-29 and the 34-40? Or did they just upload the wrong pictures?
    The General Lee replaces the largest 4 cogs of the cassette in 2 pieces: a 25-29 piece plus a 34-40 piece with a spacer between the two.

  45. #45
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    Quote Originally Posted by donkey View Post
    Does anyone have more detail on the Italian option pictured above? I went to their site but can't seem to find any info. Price, contact info.....derailleur mods necessary?
    In Italian, and Euros: Italian General Lee

    Translated: Google Translated General Lee

  46. #46
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    Itís not too difficult build your own 42 tooth cassette ring to go behind a 36-11 cassette I built one from an old cassette and a 42 tooth front chain ring. I just cut the bolt pattern out of the front chain ring and tack welded it to a 36 tooth cassette ring that I took off the old cassette. Then I took some of the old cassette rings and cut the middle spline pattern out to make spacers. Also to widen the contact area to the free hub. Tack welded them to my 42 tooth ring dropped the 11 tooth ring and installed on the hub. You now have a 10 speed 42-15 cassette. To make it shift you will need to make a new derailleur hanger that moves your derailleur ľĒ away from the cassette. I have been with this set up for a few weeks with a 32 tooth single in front. A little too much gear on long rides so I have a 30 tooth xx1 ring on order that I will try to convert to my E thirteen crank. We will see if that works out.

  47. #47
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    Hey All,
    We have several customers running our new 30tooth Drop Stop rings on their fat bikes: 104 BCD chainrings

    One of them is even using it with non-clutch rear derailleur on his Pug with no chain drops! For better security we still suggest the clutch type however.

    @PT81 - no problems sending to France, but there is additional shipping charge.
    @GTR2 - no plans for e13 spiderless, but the 104 BCD 30 tooth mentioned above offers a lower gear. We also are doing SRAM direct mount to compliment their new X9 Fat bike cranks. Those will come in as small as 28 tooth.
    Last edited by WolfTooth; 04-08-2013 at 11:04 AM.
    wolftoothcomponents.com

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    Thanks Wolftooth theres a few people here in France who are following your site. Maybe we will try to share shiping.

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    For anyone who's interested, I asked the folks at 616rfab.com about their new 135/170mm fat bike hubs and got this really nice reply:
    Thank you for reaching out to us. Yes the article is correct, we will have our new hubs ready for sale by summer and by then we also hope to have eastons new xx1 cassette body by then as well. They are making it and we were told it will be ready for us by summer. This is the only xx1 compliant hold up we are facing. The new hubs are running great and will be compatible with all other major brand's fork options. Check back with us about June. Estimated MSRP will be around $498 a set.
    I'm not affiliated in any way but I'm looking for hubs for my Clown Shoe build and If I save my pennies, I may just be able to acquire a set of these. The article referred to is here: First Look: Michigan Made 616 Fabrication Prototype Fatbike Hubs, Stainless Bikes - Bike Rumor

    Then come the spokes. I'm going light weight on those too. But I guess that's a subject for a different thread.

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