I put a set of these on my Orbea about 1.5 weeks ago. They measured up slightly narrower than the Vittoria Rubino 25s I was replacing on my Vision Team 30 rims. I noticed a very marginal speed gain over the Vittorias, and I felt a little less rolling resistance on climbs. I was pretty happy with them until I heard a loud "POP" on an evening ride. The rear sidewall blew out after less than 200 miles of riding. I know this isn't an uncommon problem with any tire, but at this price I really can't recommend a tire that fails so quickly and has such poor quality control. Luckily the good ol' gearheads are refunding me for the failed one and hooking me up with some Conti GP4000s that I should have bought in the first place. Hopefully they prove to be a more durable race tire. I like going fast, but you can't go fast if you ain't moving.