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  1. #1
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    What Frame Size to Buy?

    Finally decided on the Mojo SL but I have noticed quite a few guys have gone up a frame size. I am 6'2", 34" inseam and 200lbs. The other two bikes I ride quite a bit and like are the Cannondale Rush and Spec. Epic. I would appreciate some guidance. I have done a little chart below comparing relevant (?) measurements,

    Frame Size Comparison for Large Frames

    Wheelbase
    Cann Rush 1131 mm
    Sp Epic 1127
    Ibis Mojo 1105 (xl is 1126)

    Top Tube (effective)
    Cann Rush 625 mm
    Sp Epic 615
    Ibis Mojo 600 (xl is 620)

    Chainstay Length
    Cann Rush 422 mm
    Sp Epic 427
    Ibis Mojo 429
    Last edited by splurf; 01-01-2008 at 02:12 AM.

  2. #2
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    From Ibis

    Here is the reply to my own question that I got from the Ibis dealer in Australia

    Hey John:
    Well… I’m 5’ 8” and I ride a medium…

    Rick is 5’ 11” and he rides a large…

    Dale is 6’ and he rides a large…

    The standover height only varies slightly as you jump from Large to X-Large.
    Measured at middle of top tube 

    Size: Standover height 

    XL: 31.3" 

    L: 31"

    So as you see… you’re looking at less than ½ inch difference in standover. However top tube length increases by almost an inch:
    Size: Top tube length
    XL: 24.4”
    L: 23.6”

    At 6’ 2”… I’d suggest you go with an XL. (due at the end of Jan)

  3. #3
    Keep Riding !!
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    I'm 6'2" with a 34" (about) inseam 180 lbs, Ibis themselves, when asked, recommended a Large however the LBS recommended an Extra Large

    I ended up going with the XL, 1st with a 120mm stem and found it the correct size certainly not to large
    After about 11 months I've recently changed to a 100mm stem more to change the handling rather than reduce any stretched out/too long feel and found that with the shorter stem I'm more 'on top' of the steering

    As you can tell from your own comparison the Ibis Mojo tends to be on the small side for any given size.

    If you like tight/technical tracks you may prefer the Large to enable you to 'chuck' the bike about a bit but I would recommend from my own experience the XL for someone your size
    Just Ride !

  4. #4
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    Hi to all, I'm having the same question as splurf. I've decided to go for the Mojo SL but after I wrote to the ibis people the answer was you can choose both L and XL.
    So as you all understand I'm more confused than ever
    I'm 1.86cm (6'1"), 91cm (35") inseam and 93kg(205lbs) and I want your opinion
    what to choose L or XL ?????
    please help

  5. #5
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    having the same debate here too, I normally ride 19" bikes, I am 6.2, I tested a large and it felt ok, but looked small with me on it, so now worried if I go XL it will be like a gate.

  6. #6
    Keep Riding !!
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    XL Mojo

    Not the greatest photo but this is my XL Mojo, as per previous post I'm 6'2" & 34" inseam and it doesn't look like a farm gate to me.
    The only real difference now is the bike now has 140mm Forks (Pace) instead if the 130mm ('04 Fax Talas), a zero offset post & shorter stem
    Attached Images Attached Images
    Just Ride !

  7. #7
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    Quote Originally Posted by Quentinfarquar
    having the same debate here too, I normally ride 19" bikes, I am 6.2, I tested a large and it felt ok, but looked small with me on it, so now worried if I go XL it will be like a gate.
    Tom from Ibis posting. In general, we would recommend that some one 6'2" or shorter go with a large frame vs. an XL.

    The comparison of top tube length with your previous bikes can be tricky unless your previous bike had a 69 degree heaad tube angle.

    Our approach with the Mojo was that with 140 mm of travel and a 69 degree head tube angle the top tube lengths should be a little shorter than if you were riding a more cross country oriented bike with a 70 or 71 degree head tube angle. The theory being that the slacker head tube angle - in addition to providing more steering stability - pushes the front wheel farther out in front of you. On steep terrain this is fine, but on rolling twisty stuff there can be tendancy to push the front end because you don't have enough weight on the front wheel. With the Mojo we felt that the slightly shorter top tube would allow you to use a slightly longer stem, thus maintaining a better weight distribution over the bike for better all around handling.

    It seems - based upon the feedback of folks who have bought Mojos - that the sizing has worked out well for most people.

    Keep in mind that the head tube length increases as you go up a size as well. This could make it difficult for you to get down low enough - depending on your preferred riding position.

    If you have any further questions feel free to contact us directly.

    Happy Trails!

    PS - Before the XL tooling was finished I (6' 6") rode a large for several months and it was fine. So I don't think you'll have any trouble with the Large.

  8. #8
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    Cheers Tom, sounds like good advice... you mentioned you intended for a longer stem, what size stem for me on a large with 140mm forks, I would normally go 80mm.

    My previous bike I was riding was a Blur LT, and on paper tha frames are very similar size.

  9. #9
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    Quote Originally Posted by Quentinfarquar
    Cheers Tom, sounds like good advice... you mentioned you intended for a longer stem, what size stem for me on a large with 140mm forks, I would normally go 80mm.

    My previous bike I was riding was a Blur LT, and on paper tha frames are very similar size.
    Since your Blur LT is so similar in size and geometry to the Mojo I would suggest sticking with the 80 mm stem if you like your current riding position. That said, we had a little longer stem in mind when we designed the bike - something like a 90~110 mm stem.

    To a certain extent, I think riders have been influenced to go with shorter stems over the past few years because of the prevailing trends and not necessarily because of the relationship with the bike's overall design. Quite a few bikes with similar travel to the Mojo have longer top tubes and consequently the rider is probably better off with a shorter stem, but - as I mentioned in my previous post - that is not without its downside. The point being that stem length, steering geometry and top tube length need to be considered as a whole.

    That said, there are few absolutes. We determined the Mojo's geometry based upon our personal preferences and experience. If your current set up works for you there's nothing wrong with it. The shorter stem will mute your steering input creating a sort of understeer which may be desirable. The weight balance I described as a result of using the longer stem can still be achieved with the shorter stem by simply lowering your shoulders (mimicking the longer stem position) as needed because the top tube length and head tube angle are the same.

    Hope that answers your question.

  10. #10
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    This thread is interesting but also a little bit confusing to me. I seem to recall from some previous threads that some people have chosen one size bigger Mojo frame than normally. However based on this thread the frame size should possibly not be bigger but people should opt for a longer stem than normally.

    Personally I'm 191 cm (approx. 6'3"?) and my inseam is 92.5 cm (approx. 36.4"). At the moment my ride is Rocky Mountain ETSX-Team 20.5" which has 615 mm top tube length, 70.5 deg head tube angle and 73 deg seat tube angle.

    I would think that XL would be the only choice for me as far as Mojo goes. The top tube is 620 mm, the head tube angle 69 deg and the seat tube angle 73 deg on the XL Mojo so there would be a slight difference in the head tube angle but otherwise XL Mojo would be quite similar to the ETSX.

    I'm pretty happy with the seating position on my ETSX except for the fact that I would like to get the handlebars a little bit higher but that's difficult since the steerer tube of the fork is too short for that. My stem is adjustable Syntace VRO stem so I don't know the actual stem length at the moment.

    Am I correct in still thinking that the XL would be a good size for me? I was considering a 90 mm stem on the XL frame but now I'm not sure about that.
    Pertti
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    MC Kramppi

  11. #11
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    The Uk dealer thinks I should get a XL with a 90mm stem, as he is 6ft and rides a Large and reakons it's just on the limit for him. All this worry thou for 1/8th of an inch....

  12. #12
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    I'm was your size exactly until a car wreck I was a passenger in messed my back up and I shortened 1 inch to be now 6'1” 32 inseam, 200 lbs. I like my Large Mojo for more technical tight slower difficult and rough trails and everything faster too. If you prefer more open mostly high-speed trails then the longer wheelbase of the XL would be even more stable.

  13. #13
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    Quote Originally Posted by Portti
    This thread is interesting but also a little bit confusing to me. I seem to recall from some previous threads that some people have chosen one size bigger Mojo frame than normally. However based on this thread the frame size should possibly not be bigger but people should opt for a longer stem than normally.

    Personally I'm 191 cm (approx. 6'3"?) and my inseam is 92.5 cm (approx. 36.4"). At the moment my ride is Rocky Mountain ETSX-Team 20.5" which has 615 mm top tube length, 70.5 deg head tube angle and 73 deg seat tube angle.

    I would think that XL would be the only choice for me as far as Mojo goes. The top tube is 620 mm, the head tube angle 69 deg and the seat tube angle 73 deg on the XL Mojo so there would be a slight difference in the head tube angle but otherwise XL Mojo would be quite similar to the ETSX.

    I'm pretty happy with the seating position on my ETSX except for the fact that I would like to get the handlebars a little bit higher but that's difficult since the steerer tube of the fork is too short for that. My stem is adjustable Syntace VRO stem so I don't know the actual stem length at the moment.

    Am I correct in still thinking that the XL would be a good size for me? I was considering a 90 mm stem on the XL frame but now I'm not sure about that.
    Hello Portti,

    Tom from Ibis posting again. At 6'3" you're right where I begin recommending an XL. Also, your desire to get a little bit higher in front reinforces that - as the XL has a taller head tube. So yes, I think that the XL would be right for you.

    Happy New Year everyone!

  14. #14
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    I find this thread very helpful and timely! I just put a deposit on a new Mojo SL and need to confirm sizing. I'm 5 foot 10 inches tall with a 32 inch inseam and typically fall in between sizes for most manufacturers ... e.g. Santa Cruz. I currently have a medium Intense 5.5 (medium) with a 4.25" stem and straight seatpost. This setup works for me, but does put more weight on the front of the bike on steep descents.

    I've received conflicting feedback on whether I should go with a Large and shorter stem (e.g. 90 mm) or a medium with a 110 mm. I do not want to use a seatback seatpost. I would appreciate any further insight into this as I decide on frame size for a complete SL. Riding conditions where I ride include XC, AM and some pretty steep climbs and descents. I know I can make either work by fiddling with the seat adjustment and stem length, but I want to get this right in terms of design and bike geometry.

    So, Tall Tom, if you're still on the board, let me know what Ibis would recommend. I need to lock this down Wednesday this week.

    Thanks!

  15. #15
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    I went to a Serotta deler and paid to have a bike fit. It was well worth it for me. I am 5'9" with a 34 1/2" inseam. This makes it difficult to say the least. I have recently read that top tube should be determined by torso length and seat tube by inseam length. This makes a lot of sense to me but with my long femurs and short torso I have to go for a longer frame to get knee over pedal spindle or close to it.

    At the same time I have had to fool with shorter stems and longer stack heights to have a less aggressive position then my Serotta fit recommended. Being an old roadie converted to trails I was comfortable long, low and stretched out but I had a hell of a time getting my front wheel up.

    Where I ride there are a lot of logs, roots, and such. Interspersed with areas of soft sand. Being able to easily unweight the front wheel is critical around here in South Florida. In the year and a half I have been trail riding I have discovered that having the correct cockpit and being in the right place within makes all the difference in having a bike that you're happy with. I had to go through a few to learn that. Luckily some very experienced and savvy riders in the club I am in helped me sort it out. Good luck with your new bike.

  16. #16
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    Tat2niner,

    So, what size did you end up with?

  17. #17
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    Getting more confused.......

    After talking to Ibis here in Australia and listening to some of the above posts recommending an XL Mojo for my size I went ahead and ordered an XL for delivery in January. But now with Ibis in the US seeming to recommend a Large the opinion seems to be going the other way and I am wondering if I should have ordered a large. Obviously the Ibis is an expensive bike and I do not want to make an expensive error. Again I am 6'2" 200lbs and 34" inseam riding mainly fast tight forest trails with some technical sections And with no stock here there is no getting a proper fitting maybe Ibis would like to send me two demo bikes so that I can help them decide this argument??

  18. #18
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    Still reading... still confused....
    Now I have another question...
    I currently own a 2006 Scott Scale 40 Large and I use a 400mm seat post and it's inserted up to the minimum insertion limitation mark meaning that if I get a Large Mojo SL and for some reason (maybe the geometry) I have to move up a little how could I do that ?
    I still don't understand how a 6'2" & 34"+ inseam (91cm (35") inseam for me) can fit on the seat post ????
    help me out
    (HAPPY NEW YEAR)

  19. #19
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    This thread make me nervous... I put in my order for an XL based on the frame measurements matching my old stump jumper XL. I am 6' 1" which is short enough that Tom here would likely recommend that I have a large. My inseam is 36.5" which together with a long arm length is the reason I was put on the XL in the first place.

    I questioned the decision when my bike shop put me on the stumpy but after riding for a while the bike seemed to be a good fit. My frame is supposed to be in the first part of January (unlikely in my opinion) so the time is short if there is any time at all for me to make a switch....

  20. #20
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    Quote Originally Posted by jminn8086
    I find this thread very helpful and timely! I just put a deposit on a new Mojo SL and need to confirm sizing. I'm 5 foot 10 inches tall with a 32 inch inseam and typically fall in between sizes for most manufacturers ... e.g. Santa Cruz. I currently have a medium Intense 5.5 (medium) with a 4.25" stem and straight seatpost. This setup works for me, but does put more weight on the front of the bike on steep descents.

    I've received conflicting feedback on whether I should go with a Large and shorter stem (e.g. 90 mm) or a medium with a 110 mm. I do not want to use a seatback seatpost. I would appreciate any further insight into this as I decide on frame size for a complete SL. Riding conditions where I ride include XC, AM and some pretty steep climbs and descents. I know I can make either work by fiddling with the seat adjustment and stem length, but I want to get this right in terms of design and bike geometry.

    So, Tall Tom, if you're still on the board, let me know what Ibis would recommend. I need to lock this down Wednesday this week.



    Thanks!
    Hello jiminn8086,
    Hopefully this post reaches you in time. I didn't see your question until this morning - occassionally the Ibis guys take a day off!
    Anyway, based upon the information you've given me I would recommend that you go with the Large frame. The Mojo already has a fairly short rear end, and going with a seat post with a lot of offset post can create an excessive rear weight bias. I think the Large with a 90 mm stem that you described would give you a good result.
    To all of the folks on this thread who are feeling confused, a couple of notes:
    - First, many of our dealers have demo bikes available for you to test ride. Despite all this discussion, actually riding the bike may be the best way to find the right size. Note, many dealers will charge you a fee to ride one of the demo bikes to cover maintainance, but most will also credit this fee toward the cost of purchasing a bike. A list of dealers with demo bikes is listed on the Ibis website.
    - Second, there's only so much that we can figure out through postings. Meeting with your LBS to discuss fitting is highly recommended with one or two caveats.
    As I mentioned in one of my previous posts, there is a trend towards using short stems on bikes right now that ignores the rest of the bikes geometry. Don't be afraid to use a 100 or 110 mm stem to fit the bike properly. That is, if going with the smaller of two frame sizes means using a 100 or a 110 mm stem than that will probably be the best size for you. On larger frames (LRG or XL) going with a 120 or even a 130 mm stem is fine too. Due to the prevailing trends your LBS may try to steer you towards a short stem set up which is not always the best option.
    Also, the only advice that I can give you is based upon our experience and perspective on bike set up. It is not infallible. Depending on your personal preferences, and the area that you ride in there can be a lot of different ways to set up your bike that will work. I've been riding mountain bikes for over 20 years now and the way I set my bikes up then is far different than what I do now. So make your best guess and adjust accordingly until you find best set up for you.
    Happy New Year Everyone!

  21. #21
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    I went in to the dealer the other day and had a sit on a large again, given the difference is only about 1/8 of an inch on the top tube between the L and XL, I went with an XL with a 90mm stem, the guy at the shop is 6ft and rides a large. It does seem we are getting very stressed over less than a inch.

  22. #22
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    Thanks for the advice Tom!

    I've just placed an order for a XL size Mojo SL frame.

    Quote Originally Posted by Tall Tom
    Hello Portti,

    Tom from Ibis posting again. At 6'3" you're right where I begin recommending an XL. ...
    Pertti
    Lahti, Finland
    MC Kramppi

  23. #23
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    I have the chance to buy a well priced 2nd hand mojo, size M, i´m 170cm, 78cm inseam so my size shoud be 16", the mojo M equals a 17", what do you think?it will do? thanks

  24. #24
    MountainGoat aka OldGoat
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    SAS2, I am 5'7" with a 30" inseam and I bought a used Mojo in size M and I could not be happier. You and I are almost the same size. I think you should do it. I now run a 90mm stem and 170mm cranks.
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  25. #25
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    For Tom to Answer

    As I started this post and have an XL on order on the advice of the Australian Distributor it appears that Tom is advising that I get a L? I am 6'1" with 34" inseam. Does not bike wheelbase factor into this equation as well? The previous bike that I have enjoyed riding is a Large Cannondale Rush which has a 69 degree head angle and a wheelbase of 1131, chainstay of 422, Top tube of 625. These measurements would seem similar to the XL Mojo. The nearest Mojo to me is a seven hour drive (one way) so it is hard to test ride one as per your other advice. Australia is meant to get its next shipment in three weeks so I could still change to a Large.....

  26. #26
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    I am sure I won't be the last to ask... Another great thread too I must say.
    I am also putting together an Ibis, as I am on a longish waiting list where I live, I have for now settled for an SX , but reading this thread tells me that perhaps I should be going for an SL ?
    Is there really a big difference apart from the cost to the frame and the few pounds in weight ??
    The weight thing was my priority, now since reading this thread I have to ask Tall Tom ( anyone else as it matters ) if having a 31inch inside leg ( inseam ) and 1meter 75 height warrents a comfortable Medium size ride , or should I actually go up a size ?
    Thanks, and long live some serious threads.

  27. #27
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    Hello Richmck,

    Tom from Ibis posting. Sorry about the slow response - I've been out of town for a few days. Based on your measurements I would say that you are definitely a medium. I wouldn't recommend going up a size - you would not be pleased. As noted previously on this thread, our geometry is based on using a 90~110 mm stem in most cases. As a result, the top tube length on the correct frame may be a little shorter than a comparable frame designed to be used with shorter stem. There's no absolute right and wrong here. This is just our philosophy on sizing and frame geometry.
    Hope this gets to you in time.

  28. #28
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    Thanks for reply re: What size to buy

    I kind of worked it out in the end size wise , but you did put some doubts to rest and make me feel I made the right choice and not only in buying a Mojo !
    Be sure I will be in touch once again if I have a doubt...
    Many thnks

  29. #29
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    Hey, Tom any chance we will see and 18" size In Moj anytime soon?

    Hey, Tom any chance we will see and 18" size In Moj anytime soon ? Would be perfect for me.
    Thanks, for great responses.

  30. #30
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    Hi,

    I suppose this is another question for Tom (Sorry Tom). I'm 6,1 and am trying to decide between large and extra large. I test rode a new Fuel EX that was a 19.5" (18.5" actual), a Giant Trance X in a 19" and also a Scott Genius in a large. All of these felt comfortable. What size Mojo and length of stem do you think that makes me?

    Cheers,

    JB

  31. #31
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    Kind of the same here.
    Height - 6' 1.5"
    Inseam - 35"
    Riding - AM aggressive... in it for the descents. ;-)

    I've just ordered a Large. Will run a 90mm stem.
    Was wondering about an XL with an 80mm stem, although with my inseam, I might be too stretched.

    Arm length is at 26". Total reach (ETT + stem) should be around 70cm.
    ETT on the L is 60cm; plus my 90mm stem equals 69cm...
    ETT on the XL is 62cm; plus my 90mm stem equals 71cm...

    Rode a Giant Reign before - 20" and 23.6" ETT.
    Sucks being in between sizes. ;-)))

    Advice please?
    Oh, yeah, EVERYONE puts me on a Large... ;-)))

    I'm sure the bike will be awesome anyways!
    Plus I think I'll get it late March, early April - right in time for my b-day. Yay!

    Can't wait.
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    wizzler is a must. although then it consumes all your waking and sleeping thoughts until you can return.

  32. #32
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    Quote Originally Posted by Ro.nin
    Kind of the same here.
    Height - 6' 1.5"
    Inseam - 35"
    Riding - AM aggressive... in it for the descents. ;-)

    I've just ordered a Large. Will run a 90mm stem.
    Was wondering about an XL with an 80mm stem, although with my inseam, I might be too stretched.

    Arm length is at 26". Total reach (ETT + stem) should be around 70cm.
    ETT on the L is 60cm; plus my 90mm stem equals 69cm...
    ETT on the XL is 62cm; plus my 90mm stem equals 71cm...

    Rode a Giant Reign before - 20" and 23.6" ETT.
    Sucks being in between sizes. ;-)))

    Advice please?
    Oh, yeah, EVERYONE puts me on a Large... ;-)))

    I'm sure the bike will be awesome anyways!
    Plus I think I'll get it late March, early April - right in time for my b-day. Yay!

    Can't wait.
    An extra large with a short stem would kill steering. Steering is best for most at about 100 mm on Moj it would seem, although 90 would make the downhill more fun for you. Hey jumping bean, was that the new 18.5 size you tried that Trek has in it's lineup this year ? For many years like Ibis they only had a 17.5 and 19.5. But with the new lifetime warranty abp ex line they added a 18.5. size for hard to fit riders. (sounds like a commercial. Note, I still order a Moj. Trek lost me when they went to alum rear triangle, I'm pretty picky.)
    Last edited by ghawk; 02-18-2008 at 04:20 AM.

  33. #33
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    personal experience

    I have just got my SL at last. I am 181 cm (5' 11" +) and had Blur LT in Large before. I felt it was a little bit too big for me. I am always between M nad L. Having read Tall Tom posts here I decided for M Mojo. But I was not sure whether I hadn't made a mistake. But finally spent two days of the last weekend in the saddle I can say my choice was right. The bike is much more nimble in switchbacks than BLT which I expected anyway but it is better climber than Santa, and this I do not understand, because it has 2.5 cm shorter weelbase. Only one drawback, there is a tapping noice coming from the frame when in rough terrain. So I had to have it inspected in LBS. I hope they will find it.

  34. #34
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    Quote Originally Posted by ghawk
    An extra large with a short stem would kill steering. Steering is best for most at about 100 mm on Moj it would seem, although 90 would make the downhill more fun for you...
    Exactly my thoughts. Dunno if I'm gonna go with an 100. Goin' aggro.

    Woo hoo!
    Quote Originally Posted by Khemical
    wizzler is a must. although then it consumes all your waking and sleeping thoughts until you can return.

  35. #35
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    Okay, so for me at 176cm with an 83cm inseam I would need a what size frame?

    176cm = 69.3"
    83cm = 32.7"
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  36. #36
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    Okay, so for me at 176cm with an 83cm inseam I would need a what size frame?
    At 5'/8" I think that is easy a medium. imho of course.
    A little longer stem than used on the racer-x might give you more of an easy transition to a 5" travel bike. See my previous post for my convoluted logic on how my sizing worked out on med moj. Like what Tom says above about longer stem with moj head angle.
    Last edited by ghawk; 06-01-2008 at 06:21 AM.

  37. #37
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    Medium.

    I am 5'10" with 33" inseam, and I have a Medium.

    Note that your seat post will be pretty high up because of these long legs you have. (It is on mine and we have the same inseam.)

  38. #38
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    What lenght seat tube and stem are you runnig?
    There's a feeling I get
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  39. #39
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    Quote Originally Posted by tat2niner
    I went to a Serotta deler and paid to have a bike fit. It was well worth it for me. I am 5'9" with a 34 1/2" inseam. This makes it difficult to say the least. I have recently read that top tube should be determined by torso length and seat tube by inseam length. This makes a lot of sense to me but with my long femurs and short torso I have to go for a longer frame to get knee over pedal spindle or close to it.

    At the same time I have had to fool with shorter stems and longer stack heights to have a less aggressive position then my Serotta fit recommended. Being an old roadie converted to trails I was comfortable long, low and stretched out but I had a hell of a time getting my front wheel up.

    Where I ride there are a lot of logs, roots, and such. Interspersed with areas of soft sand. Being able to easily unweight the front wheel is critical around here in South Florida. In the year and a half I have been trail riding I have discovered that having the correct cockpit and being in the right place within makes all the difference in having a bike that you're happy with. I had to go through a few to learn that. Luckily some very experienced and savvy riders in the club I am in helped me sort it out. Good luck with your new bike.

    this was an interesting post for me because i'm almost the same size as you at 5' 9.5" with a 35" leg extension...which is a difficult fit...
    so bro what size mojo frame and stem did you end up finding that fit you correctly and are you using a non set back seat post in that configuration..? also to help you unweight the front wheel did you set your handle bar height level with your seat in typical AM style or something different..?
    tread lightly...earth is our playground

  40. #40
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    I have recently read that top tube should be determined by torso length and seat tube by inseam length. This makes a lot of sense to me but with my long femurs and short torso I have to go for a longer frame to get knee over pedal spindle or close to it.
    Yep, I too similar to old roadies tend to like the xc racer like stretched out position.
    Being an old roadie converted to trails I was comfortable long, low and stretched out but I had a hell of a time getting my front wheel up.
    There are some that have the theory that you don't have to be low via seat height and stack height to really get long and "lower" back without being down on the handlerbars...more reaching than down with longer stem by a couple of centimeters.
    But, if you are allready stretched out and THEN low relative to stack height also, that could be a difficulty with getting control of the front wheel (pure body balance.)
    The longer stem would give you the feel of a less slack h/a on med. moj which could help steering if your weight balance is right relative to seat height and stack height mentioned above.
    Also, over the years many have found that classic fit kit american cycling academy knee position over the crank is not always right for everyone given the myriad of differing body types and physical adaptions that people make on the bike, but you gotta start somewhere.
    Also, Also, I have a pretty good treatise on bike ergonomics to prevent carpal tunnel syndrome and hand vibration syndrome that can show up related to mountain biking. One of the top ten related to that is correct hand arm angle and wrist hand weighting. oops tangent.

  41. #41
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    So those of you that are between a L and XL, which way did you go? Any regrets wishing you got the other size? Most importantly, are you using a setback seatpost and what length stem are you running?

    I'm 6'1" with 34" inseam, and still trying to decide.

    Thanks
    -Dan

  42. #42
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    Quote Originally Posted by dan51
    So those of you that are between a L and XL, which way did you go? Any regrets wishing you got the other size? Most importantly, are you using a setback seatpost and what length stem are you running?

    I'm 6'1" with 34" inseam, and still trying to decide.

    Thanks
    -Dan
    Hello Dan,

    Tom from Ibis posting. You have a fairly long inseam for a large, but thankfully that is why seat posts seat posts offer such a large range of adjustment. The thing that is of more concern will be the top tube length. Obviously you can adjust the cockpit size by stem length and using an offset seat post, but that can have a big effect on the way the bike handles.

    Since your inseam length is long for your height it is safe to assume that your torso is short for your height. Consequently, I'd recommend staying with a large.

    In regard to the stem, it is hard to make an absolute recommendation, but I would suggest a 100 or 110. It good way to start might be to measure the total length of your top tube and stem from your current bike and then subtract from that number the top tube length of the large Mojo. The correct stem length will be the remainder.

    In regard to offset seat posts, optimally you wouldn't use an offset post. The Mojo has a fairly short rear end and using an offset post can create an excessive rear end weight bias. That said, depending on your particular riding style and body type a setback post may be necessary.

    Happy Trails!

  43. #43
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    More questions for Tom

    I'm having the same size issue. I'm 6' 2" , 175 lbs with a 35" inseam.

    I rode a demo large and the bike was great, but it felt a little short and a little low in the front. Especially compared to how high my seat is. That was with a giant stack of spacers (1" to 1 1/2" I didn't measure). Also, it had a 90 stem. My large racer x is about the same height in the front but it feels much longer, but I run a 110 stem.

    I'm having a hard time understanding why the XL wouldn't be better for me since I could run a shorter stem and possibly less spacers under the stem. If I ran the L with no spacers I think the front end would be lower than any XC race bike I've ridden. Is that the intent? I'm not really worried about the length of the cockpit, more the height of the bars. I also felt I was getting throw forward a bit off of jumps at first but I seemed to get used to that as the day went on.

    Should I really go with the L? There doesn't seem to be any XL demos in my area to try so I don't think I can do a comparison.

    Thanks.....

  44. #44
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    Quote Originally Posted by s1ngle3trackrules
    I'm having the same size issue. I'm 6' 2" , 175 lbs with a 35" inseam.

    I rode a demo large and the bike was great, but it felt a little short and a little low in the front. Especially compared to how high my seat is. That was with a giant stack of spacers (1" to 1 1/2" I didn't measure). Also, it had a 90 stem. My large racer x is about the same height in the front but it feels much longer, but I run a 110 stem.

    I'm having a hard time understanding why the XL wouldn't be better for me since I could run a shorter stem and possibly less spacers under the stem. If I ran the L with no spacers I think the front end would be lower than any XC race bike I've ridden. Is that the intent? I'm not really worried about the length of the cockpit, more the height of the bars. I also felt I was getting throw forward a bit off of jumps at first but I seemed to get used to that as the day went on.

    Should I really go with the L? There doesn't seem to be any XL demos in my area to try so I don't think I can do a comparison.

    Thanks.....
    I have similar measurements as you (see previous post) and was torn between the L and XL. After demoing both L and XL, I decided on the XL. The L felt great except on steep downhills and when standing and pedaling. I've got the XL set with a 90mm stem, with about 1" of spacers under it. This puts the seat and handlebars at the same height unsagged. I have no regrets in going with the XL, it's perfect for me with my current setup. I've put 80 miles on it in the past 3 days, and love it.

  45. #45
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    For those of you around 5'10", what frame size did you end up with?

    I'm 5'10" with only a 31" inseam, which means I have a longer torso than you folks with long legs. Currently my Blur classic has a 135cm stem which is probably overly long. The medium Blur classic and Mojo frame sizes have similar sizes (BL top tube = 23" & Mojo top tube = 22.8). I have stand over room on the Mojo large, but stand over on the medium Mojo is a bit better fit. However, my upper body fits the Mojo Large (23.6" top tube) better than the Medium (similar issue as the Blur). In riding, the medium Mojo feels like what I'm used to, but I'm thinking that the Large is what I should go for.

    Any comments/thoughts/etc

  46. #46
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    ... and if we just ... maybe able to help on sizing

    Hi,

    I had the same trouble getting the right size when I bought my mojo a couple of months ago. I am 6'1" my measurement from the crotch to the floor is 35" . I finally ordered a XL with some advice from Scot not saying any of the other advice you have had is wrong. The stem is 110 and I have now done about 500km+ social and racing .

    Hope this helps

    As I know how hard it is to get it right


    Cheers


    Blackyeti

  47. #47
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    Thanks Blackyeti

    After speaking with IBIS and also getting an Email from Scott, I decuded to go with the Large

  48. #48
    KevinK
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    I'm about the same height, around 5'8". What length is your stem?

    Thanks,

    Kevin

  49. #49
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    Second Guessing

    I guess this should be directed to the resident expert TallTom. Inspite of the fact that I know everything indicates at 6' 185 lbs with a 33" inseam I should ride a L. However, I cannot say why, I attribute it to my MotoCross backround, I like to be on a big bike, I like to be streched out, so I ordered a XL Mojo with a 100 mm stem.
    Based on the Mojo experience of those who ride them, am I going to be okay?
    For the record, I am currently on a 21.5" Trek Liquid 2o, I tried a 19.5 and felt like I was much to erect?
    Thanks in advance for your input, as of now possibly I could change the order to a L?

  50. #50
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    Quote Originally Posted by YZF571
    I guess this should be directed to the resident expert TallTom. Inspite of the fact that I know everything indicates at 6' 185 lbs with a 33" inseam I should ride a L. However, I cannot say why, I attribute it to my MotoCross backround, I like to be on a big bike, I like to be streched out, so I ordered a XL Mojo with a 100 mm stem.
    Based on the Mojo experience of those who ride them, am I going to be okay?
    For the record, I am currently on a 21.5" Trek Liquid 2o, I tried a 19.5 and felt like I was much to erect?
    Thanks in advance for your input, as of now possibly I could change the order to a L?
    Hello YZF571,

    Sizing is not an absolute thing. Based upon your height and inseam I would recommend riding a large, but you seem to know what you like and what you are comfortable with. That's the whole point of sizing anyway, right?
    Just a few things to consider:[/LIST]You have less mobility on a bigger frame. On a smaller bike it is easy to move around on the bike.
    The wheelbase on a bigger bike is longer - longer bikes are more stable in a straight line, but slower handling.
    Also, the head tube on the XL is taller - so your bars will be higher, and you could end up more upright.
    Anyway, if you you feel confident with your current set-up stick with it.
    Let me know if you have any more questions.
    Take Care,
    Tom

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