Rear Wheel Bearing Retainer. The All Balls Rear Wheel Bearing Retainer is a high-quality, precision-machined hardware solution designed to securely lock rear wheel bearings into the hub assembly. Built to hold high-speed bearings precisely aligned inside the wheel hub. Machined to exact O.E.M. specifications to resist severe corrosion. Engineered as a direct replacement component for rear hub rebuilds. Note: Kit contents will vary depending on model and may not match image shown. Kit Includes: 1 wheel bearing retainers).