Super strong bearings that have three times the load rating of the stock bearings highlight this set of ultra durable rear carriers. RPM bearings will hold up much longer for smoother and more dependable operation. RPM carriers are designed to remove most of the power robbing, telescoping action of the dog-bones (universal shafts). Our bearing carriers are made from a unique blend of nylons that makes them much stronger than any other product available. Molded in black.