ENDURO BEARINGS CH MR 2437 W/SH

CH MR437w/sh - ABEC-5, Ceramic-Hybrid Radial Bearing - 24mm x 37mm x 7mm (with stainless bearing shields) Ceramic-Hybrid Radial Bottom Bracket Bearing featuring 52100 high-Carbon Chromium alloy races paired with grade 5 Silicon-Nitride Ceramic balls with 90% fill, high-pressure, water-proof grease. Si3N4 ceramic balls reduce bearing wear and increase bearing life by eliminating steel on steel contact within the bearing. Two super-thin stainless steel shims/shields are included for an additional barrier against the elements. The most common use for this bearing is as a direct replacement bearing for Shimano external cup BBs. Enduro