AFAM: the leading technology AFAM has been designing and developing top quality drive chains since 1975 and has acquired special know-how in this field. The brand constantly renews its technologies and products in order to offer the very best transmission for your bike. 520 XHR2 type chain – super reinforced Riveted mounting – hollow shaft Xs-ring O-rings (AFAM technology) Chrome-plated shafts and forged rollers: increase the service life of the chain Lightweight pads to reduce the weight of the chain Performance and durability: Reduced friction thanks to the Xs-rings For road and circuit riding from 500cc to 1000cc