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Tall Tri-bike fit

danpatgal's picture
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started by danpatgal on October 31, 2007

I recently purchased a Felt S32 triathlon bike (my first tri bike) recently ... it's a 60cm 2006 model, so has a less aggressive SA of 75.5 as compared to the newer/smaller bikes. I'm 6'4" with a 36" inseam, so the seat is as high as it will go. And though I have adapted to the aerobars easily, I still feel a little cramped in the legs. I haven't done any scientific fitting or measuring, but it seems like I shouldn't need more leg room, but that because the angle is different it feels more cramped. I've also moved from 180mm cranks on my road to 175mm on the tri-bike, not sure if that has something to do with it.

So, my question is if this transition to a tribike is normal, and my legs are needing to just get used to a more cramped angle or if the bike really is too small for me or fit wrong ...

Thanks for any comments - Dan.

Iron Dan's picture
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Iron Dan posted 49 weeks ago.

I can tell you for sure that the bike is not to small for you. Also, I don't think many place make a frame that is larger than a 60cm for a tri frame. So this sounds like a fit/comfort issue to me more than anything, so don't worry about buying the wrong size bike. I am 6'4" and have a 60 cm frame and if anything it is a little large on me.

I would suggest going to a FIST certified fitter in your area and getting fit. It can seem a little spendy, but it is worth it.

UFTriGator's picture
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UFTriGator posted 49 weeks ago.

Tri bikes will always feel more cramped because they have a shorter top tube than a similarly sized road bike. Most likely, it's just the feeling of being in a better aero position. Make sure your knee makes about a 155 degree angle when your foot is at the bottom of the pedal stroke and that your shoulders and elbows are at 90 degrees when in the aerobars. If all those things are right, your fit is already pretty close.

______________________________________________
-Matt
Not fast enough.

Triguy98's picture
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Triguy98 posted 49 weeks ago.

Definately not too large. I second the fit advice. It can run $150, but is worth every penny. you can spend $150 on stems alone trying to dial in your fit yourself (I have a collection of 4 in my bike box.) I am willing to bet the main contributors are the aero position itself, and the shorter cranks will feel odd, too. I had 180s on my old MTB, whe i switched to 175s, I felt odd for a long while.

Life is short. Play hard and get dirty doing it.

danpatgal's picture
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danpatgal posted 49 weeks ago.

Thanks for the comments, reassurance. I've been riding the tri bike a few times now to work and back and I'm slowly tweaking things and getting used to the feel. I may do a fitting in the spring as all of you suggested.