The SRAM DoubleTime Freehub Bearings (63803D28) are a sealed cartridge bearing set engineered for use in SRAM DoubleTime hubs. These high-quality steel bearings are designed to support both the freehub body and hub shell rotation, providing smooth, low-friction performance and durability under varied riding conditions. The sealed design helps keep contaminants like dirt, mud, and water out of the bearing internals, reducing wear and extending service life.