Angular contact bearings provide maximum load distribution across all of the ball bearings unlike standard bearings which load only those at the bottom of the bearing this load distribution ensures bearing life is increased drastically allowing for more time spent in the saddle than the workshop bearing code acb 3748 dimensions 37x48x65mm 4036x4541 abec 3 grade 10 seals llb grease kyodo yushi ps 2 application headsets weight 2525g