MRA 2437 LLB - ABEC-5 Angular-Contact Bearing (C3 clearance) - 24mm x 37mm x 7mm This Angular-Contact ABEC-5 bearing features deep-groove design races, with Grade 10 balls, dual-lip labyrinth (LLB) seals to withstand daily abuse of use and the elements, and to contain the 90% fill Mobilux NGLI 2 high pressure water proof synthetic grease. When properly installed (black seal facing in) and adjusted, Enduro Angular Contact (A/C) bearings engage all of the bearing's balls to spread the force over a larger surface area, decreasing friction, minimizing wear and increasing bearing life. The most common use for this bearing is as a direct replacement bearing for Shimano bottom brackets with a 24mm OD spindle. Static load - 773lbf / 3.44kN Weight - 30.99gContains a high quality, durable and long lasting 2437 MRA Enduro AC suspension bearing to keep your mountain bike performing at its very best!