Hello again,

I posted a thread a couple of weeks ago about a mystery squeak coming (seemingly) from my cranks on my Trek Madone 5.2sl I bought used this past summer. After trying a few things suggested on the thread, I most recently brought it into the local Trek dealer and had them completely replace my bottom bracket with a brand new Dura Ace BB. The mechanic has been servicing Treks forever and said my old BB was pretty well worn...should fix the problem. I travel out of town for work, and live in Michigan, so the past few weeks I've been limited to riding on my trainer and not outdoors (can't produce the squeak on the trainer).

Anyway, with some warm weather this weekend I went out for a ride to test out the new BB...as before, the squeak started about 8 miles into the ride and I dare say, it was worse than ever. Another solution (and $$) down the drain.

The other fix I've wanted to try is to switch my rear wheel with another one. So, I put on a different rear wheel borrowed from my dad, took the bike out on the same course, same effort, and there was absolutely no squeak at all. Crazy.

So, this leads me to the next question: What's wrong with my rear wheel, and why does the rhythmic squeaking/rubbing sound come from my cranks and not the rear wheel?

I have Velocity wheels riding on fairly new GP4000s. I did bring my rear wheel in to a bike mechanic previously who tested all the spokes & said there is absolutely nothing wrong with the wheels. Since Velocity is a local company he said that if there was anything wrong with the wheels, Velocity would replace them, but absolutely nothing was wrong.

Any ideas? Am I condemned to buying a new wheelset?

Thanks for any opinions.