Joined: Jul 2002
Posts: 40,863
Likes: 3,116
From: Sacramento, California, USA
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
A lot of variables are involved, but if you ride on decent roads, keep them at good pressure, and don't skid, these should last you several thousand miles.