Subject: RE: Deal: Race tires and Latex tubes w/low Crr? KathyG - 2011-09-13 9:47 AM Do you have the Continentals? How tough were they to get on? How durable have they been for you? Which is better 20C or 23C for Zipp 404s? 20C will be more aero on the older 404s, with a bit more rolling resistance. But you have to pump them to much higher PSI if you are heavier than 160 or so which can make them roll a lot worse. At 153 I was 115 psi front (20mm) and 105 rear (23mm) This is why we don't all ride on 16mm tires. |