KOVNOVI 2153114-2RSV MAX Bearing 21.5x31x14mm Double Row Full Balls Bike Bottom Bracket Frame Repair Parts Ball Bearings (1PC) AccessoriesWHAT ARE MAX BEARINGS?Designed specifically for suspension pivots, the bearings pioneered MAX type bearings for bicycles to address the challenges associated with mountain bike pivots. These bearings have 35-40% ..