Originally Posted by
HTupolev
What's the "instability" you're having problems with?
-Bike handles noodly when out of the saddle at low speed?
-Steering is twitchy at high speed?
-Steering jerks around too much during crosswind gusts?
-You've got a shimmy, steering starts wobbling on its own?
One thing I noticed on the stock wheels (
PR-2?) on my former Giant defy was low spoke tension and obvious brake rub. Better wheels that that is definitely available, or an experienced mechanic could have improved on the poor factory assembly. I do how ever agree that there needs to be some reason to buy new wheels other than "just because" or imagined shortcomings. If possible try some "better" wheels before committing to the expense.