To suit 1 1/8'' forks Split type 7075-T6 aluminium crown race for simple, tool free installation Upper Bearing: 41mm OD, 45 x 45 Degree AC sealed bearing Lower Bearing: 41mm OD, 45 x 45 Degree AC sealed bearing 'SHIS' standard headsets Headset comes complete with top-cap (star-nut included), bearings and crown race - all parts required for fitment 
