Less rolling resistance with ballraces.We just stake those outer races in, fairly easy to do. It seems to work and you can stay with the high capacity roller. The dynamic load numbers are 35kn for the 1" roller (or 61 kn if you are stuck with a TP porkchop crank and it's big Superblend type bearings, )
vs 22kn for the 1" ball.
The two ball bearings must be up to it, although it would have been only very short full power bursts on the Martz/Auger drag bike.
Glen
Yesterday was the first run: 99.3 mph, which sounds like a good test for a new bike.
David