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Frame size question(3 posts)

Frame size questionDiamondback
Jul 21, 2002 9:52 AM
I am new to this forum, so if I am in the wrong place, gently nudge me in the right direction. I am 5'10" with a 33" inseam. Long legs, short upper body. I am trying to find a bike with top tube dimensions and such that would accomodate me. It is a bit uncomfortable on long rides on my current bike. Not sure what my dimensions are in bike jargon. The measurements are 22 1/2" from the center of the handlebar post to the center of the seat post on the top tube. What size would anyone suggest I buy? Am I barking up the wrong tree and should just get used to stretching for my aero bars and sliding off the front of my seat when I get busy with a high cadence? Any tips would be greatly appreciated. Take care and safe riding.
try a shorter stem????C-40
Jul 21, 2002 12:23 PM
They come in many sizes, you know. Most are made in 9-13cm lengths. The height and inseam that you posted are quite average, IMO. I have a much shorter torso, and have no problem getting an excellent fit from many standard geometry frames.

The top tube (TT) dimension that you have posted is 57cm (multiply inches by 2.54). This would suggest that the frame size may be in the 57-59cm range, which may also be too large. A properly sized frame will have a standover height that is 3-5cm less than your inseam.

Be sure that you have measured your inseam corectly. Try these sites for info on fit:

http://www.peterwhitecycles.com/fitting.htm

http://www.coloradocyclist.com

http://www.cyfacusa.com/Frame_Fitting.htm

The most common formula for frame size is .67 times inseam, which would recommend a 56cm frame, measured center to top. At your height, excessive top tube length should not be a problem with 55 or 56cm frames. A stem length in the 10-12cm range would be common.
try a shorter stem????Diamondback
Jul 21, 2002 3:31 PM
Thanks for your reply C-40. I purchased my bicycle several years ago and have always felt that it just did not feel right. I guess it just proves that you have to trust your own judgement sometimes and do your homework before buying and not put all your faith in the LBS employee. Thanks again.