When we are looking to take our performance to the next level, the CeramicSpeed OSPW X SRAM Transmission AXS derailleur pulley takes a great rear derailleur to 11. Featuring 14 and 20-tooth pulley wheels, complete with a narrow/wide profile and a two-piece solid disc construction, the OSPW X SRAM Transmission AXS gives us a faster, more efficient pulley wheel configuration. The stainless steel dust shields help with aerodynamics, keep the bearing clean, and ensure no sticks or rocks get jammed in the pulley wheel. The dual-sided sealed bearing provides a long-lasting, efficient design, and the serrated profile on the pulley wheel drives dirt and debris away from the bearing to prolong its life.