Originally Posted by
JohnDThompson
Most rear hubs use 10 or 11 1/4" balls.....
Small point but all of the cup-and-cone rear hubs I've worked on (except recent Campy Chorus) use 9x1/4" balls per side. Front hubs typically use 10 or 11 3/16" balls per side.
My Chorus hubs require (IIRC) 15x 5/32" balls per side held in a plastic retainer for both front and rear.