I just ordered new wheels for my Trek 1.5. Velocity A23's, White Ind hubs, Dt spokes. I ordered from Prowheelbuilder, although it was a close call b/w them & Zen Cyclery. Interestingly, both places told me when I asked about tires to just use the tires I have. Do they not make much of a difference? I just ride for fun & fitness, no racing or competition anything. Just want to keep up on group rides with more experienced friends, and get up hills a little easier.