Rear Carrier Bearing Upgrade Kit. Bearings often fail due to water and dirt contamination, and this upgrade kit is engineered to address exactly that. The Turner Performance Products Rear Carrier Bearing Upgrade Kit is specifically designed for the harsh conditions of powersports use, providing smoother operation and extended service life. Features: Includes ball bearings and seals needed to upgrade a rear carrier for smoother action and longer life. Rubber-sealed bearings offer added protection against water and dirt intrusion. Precision high-speed bearings manufactured to ABEC3 standards for consistent performance. Double-lip Type TC Nitrile elastomer seals provide superior exclusion of contaminants and improved grease retention. Bearings are pre-lubricated with Chevron SR1-2 grease, formulated with high-performance rust and oxidation inhibitors and rated from -29°C to 177°C.