RPM oversized bearing carriers are the perfect solution for worn bushings and weak 5 x 8mm bearings. 5 x 11mm bearings have higher load ratings than the stock 5 x 8mm bearings and will significantly increase the time between maintenance periods. In addition, RPM's bearing carriers are so strong; they guarantee that they won't ever break! When used in conjunction with #80382 Rear Bearing Carriers, you'll never have to worry about worn-out bushings or blown wheel bearings again!Tech Notes: 5x11x4mm. bearings are not included with these kits (4 bearings are needed for each kit).