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Bike sizing(4 posts)

Bike sizingdickruthlynn
Aug 10, 2003 9:02 AM
I have the opportunity to purchase a new 03' Trek 5500 triple for $2499 (DA). The problem is, it is a size 56 and my other road bikes are 54. I am 5'-10" with an inseam of 29" and my sleeeve length is 31". What problems will I have? I think the shortest stem is 90cm.
Trek sizing...C-40
Aug 10, 2003 9:45 AM
How are your other road bikes measured? Trek measures to the top of the seat tube, which makes a 56cm about the same as other brands 54cm size, measured to the top of the top tube.

I doubt that your cycling inseam is 29 inches or 73.7cm. If it was that short, you couldn't standover an average 54cm frame, which has a 79cm standover height. Read up on fit measurments at www.cyfacusa.com. Cycling inseam is measured in bare feet to firm crotch contact, it's not your pant's inseam.
The TT....Rusty Coggs
Aug 10, 2003 1:46 PM
...on the trek 56 is 56.2cm,longer that that of any 54 I know of. Measure the TT length, and stem on your ride and decide on how short a stem you want to try and live with.
true...C-40
Aug 10, 2003 2:48 PM
The Trek is an oddball, vertically it has the 79cm standover of a typical 54cm c-t frame, but has a long top tube, more likely to be on a 56cm. The perfect thing for someone with a long torso.