Enduro-MAX Cartridge Bearing Features: High performance cartridge bearing with 35% greater load capacity than a standard retainer separated cartridge bearing Designed specifically for suspension pivots. Generally do not spin as smoothly as retainer bearings due to their maximum complement of ball bearings (MAX) 90% filled with the highest quality grease Specifications: Bearing: 1728 Dimensions: 17 x 28 x 6mm (ID X OD X W)