Hello everyone, I recently bought a Cervelo R3, and it came with Vittoria Diamante Pro Light 25mm tires. I have 2 questions:
1) I was surprised after riding the bike for 2 months with the tires inflated to 110 psi, that the reccomended pressure is 130 psi min. to 160 psi max. I have since inflated them to 140 psi (I am 185 lbs.) The ride is harder, but not to bad. Is this high pressure due to the fact that the tire is 25mm vs 23?
2) What difference if any would I notice if I went to a 23 mm tire. One LBS guy says the 25 mm has less rolling resistance because it is crowned more than the 23mm and thus actually has less of a contact patch. What say you???