monsrider wrote:
One difference between an old P3 and the newer ones is the width of the frame at the bottom bracket. The old ones had the slimmer frame with the bearings on the outside of the frame. The newer ones have the bearings incorporated inside the frame, hence the frame is wider but also stiffer. The trend of many bike manufacturers now is to have the wider frame at the BB as exemplified by BB30, BBright, BB386 EVO etc.A difference I can't discern doing 1500 watt sprints on a road bike, much less while doing a time trial.