Slowrollin': Thanks for your input. I would think the smoother bearings would offer a good benefit to those of us slow rollers tho. I kind of compare it to the difference between knobbies and 'slicks' for MTB wheels. Knobbies will get you there, but 'slicks' will do it easier. The smoother polishing that is possible on Si3N4 makes these hard suckers roll easier, which seems to me would help more at slow speeds, since the increase in wind resistance will take more of your power output as speed increases. To me, that means on climbs, more of my output can go into moving the bike forward, instead of overcoming parasitic resistance. GRANTED we may only be talking 3, 4, or 5%, but I still would rather be putting that amount into moveing the bike.