The Onyx Ultra is the middle of the rear hubs, it has a larger axle and instant engagement clutch than the ordinary pro hub while still fitting a standard Shimano style cog.
It features ceramic bearings and titanium hardware.
10mm bolt on, 6 bolt disc mount or without disc mount 36 spoke hole drilling.
20 mm front hub with ceramic bearings as well. 36 spoke hole drilling, matching both rear hubs
