Join Date: Oct 2010
Location: Central Texas
Bikes: 2006 Trek 2100, 1973 Crescent Mark XX, 196x Peugeot PX-10
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I bought a used Trek for my niece on ebay. I gave it what I thought was a thorough safety check and all seemed fine. It appeared to be straight "off the rack" with everything stock from the original purchase. I couldn't ride it myself as it is a 47cm with 650c wheels while I ride a 58cm.
For months I had a nagging feeling that the fit just wasn't right, but all the measurements and position seemed right. Finally I started to wonder if she needed shorter cranks. That was when I found out that the left crank arm was 175cm while the right was 165cm! Same make, model, year, just different lengths. I have no idea if it was assembled that way at the factory, at a bike shop or by the owner. The seller was selling for a "friend of a friend" so no answers there. I found a close enough replacement arm and was finally able to get the fit better.
I had looked at the right crank arm when the bike arrived, and was satisfied that 165cm was correct for her height, but never thought to check for a matching left side...