I recently purchase a used LeMond Tourmalet. I removed the bearings from the rear hub (stock Bontrager wheels) and out popped 18 bearings, 9 on each side. So far so good. I then cleaned the bearings and hubs, re-lubed everything and proceeded to replace the bearings. On the drive side all of the bearings went in without a problem. On the non drive side, however, I could only fit 8 bearings. The ninth bearing did not have room to fit. How could this be if I took 18 bearings pit of the hub to begin with?