Mitch Harris asks "... if anyone has trouble stopping with vintage single pivot sidepulls..."For context, I ride hills and mountains and have used SPs and CPs and cantilevers and disc brakes. Using SPs from Campagnolo, Weinmann, Modolo, Galli, GB, Lytaloy, Sun, Gipiemme, and Beborex, along with good brake pads,I've had no problems with properly adjusted SP brakes. I've had issues with brake levers, specifically leverage (hand fatigue) or reach, but not the brake calipers.Peter.......... Peter Brueggeman La Jolla California USA 4peebee(at)peterbrueggeman.com