Quote Originally Posted by Catriona View Post
That bike has a pretty sloping geometry - the 15" is on a bigger bike than the seattube measurement would imply. The top tube is 533 mm... At 533, that's pretty long, which would argue for it being possible to make that bike fit - And one of her complaints is that she's leaning forward and putting too much weight on her hands making her wrist hurt. So she'd probably be better off with a shorter or higher angle stem that would allow her to sit more upright and put less weight on her hands.
I agree... I am 4 inches taller and I have a 17.5" trek 7.2fx (not the WSD), and if anything it's verging on being "too big" for me with a top tube length of 54.8cm and a 110mm stem (I swapped out a shorter one when I changed my bars). If you look at the WSD fx bikes, the top tube length between the 15 and 17 is only 6mm.. which is relatively insignificant.

I had fit issues on my fx and I really think that the fx was just the "wrong" bike for me in a lot of ways... my LBS "fit" me on it when I bought it, and it had been the bike I was happiest with when I first went shopping, but there were a number of issues that I was aware of within my first couple of rides. I was pretty sure within 2 months that I should have bought a road bike instead, but when I was initially shopping, I didn't like how they felt, and I know if I had been road bike shopping, I absolutely would have bought the wrong one to begin with. My husband who is only 1" taller than me fits the fx a lot better (with the stock bars and stem) because his torso is longer (as well as his arms)

The top tube on my road bike is 52.5cm and I have an 80mm stem on it... it fits like a glove despite the fact that it's bordering on what many LBS would consider "too small" for me given my height.. but it's comfortable for me and I love it.. I test rode a lot of bikes before buying "mine" though - I didn't want a repeat of bike #1

Too much weight on the hands suggests to me that the reach is too long, or that the bars are potentially "too low" for the style of riding she'd prefer to do.