BB MR 2437 LLU/LLB A5-bag | 24 x 37 x 7mm Bearing

MR 2437 LLU/LLB A5 - ABEC-5 Radial Bearing (C3 Clearance) - 24mm x 37mm x 7mm ABEC-5 Radial Bottom Bracket Bearing featuring 52100 High-Carbon Chromium alloy races paired with grade 5 Balls with 90% fill, high-pressure, water-proof grease. Designed specifically for bicycle applications, the LLU/LLB seal combination on these bearings utilizes a more protective gray LLU seal facing outward, towards the elements, to reduce contamination from water or dirt, while the lighter-contact (less seal-drag) black LLB seals facing inward keep the grease where it belongs. The most common use for this bearing is as a replacement bearing for Shimano external-cup, bottom brackets with a 24mm OD spindle cranksets. The Enduro line of bearings are available in high-carbon chromium steel, 440C stainless steel, ceramic-hybrid and XD15 with ceramic or stainless balls. Our bearings are always engineered with deepest groove races possible to accommodate the largest balls and feature dual-lip seals that ride in a micro-groove creating a full labyrinth to provide superior protection against the elements.