Everything about Chris King’s ISO rear hub means business. From the extra-large hub shell and wide-radius spoke flange, to their own in-house ball bearings and lightning fast engagement. The ISO rear hub might just be the last hub you ever own. The 142 x 12mm axle adds rear end stiffness and efficiency, and these hubs are compatible with 135mm-wide, 10mm, and 12mm replacement axles (sold separately).