Thought I'd share this point on tires. I have been riding on Continental Ultra 2000's for about three years. I had been riding on Conti GP3000's but I got a great deal on a bunch of the Ultra's. They have finally all worn out and I put on a new set of Michelin Pro Race tires (same size as the Ultra's) and I could not believe how much nicer my ride was. Mind you this is a very noticable ride improvement on a Ti bike with wheels built with Carbon&Kevlar spokes. I was actually astounded. I have no idea at this point how they will wear (the Ultra's lasted a long time), but even if they are short lived it might just be worth the trade off!