Sram AXS 12spd 12T Ceramitech Road Bike Pulleys (Set of 2)Info Product Intro Vid Maintenance Vid Rock solid chain control means crisper shifts while Ceramitech bearings channel all your hard work to the ground. Each Sram AXS 12T road bike pulley set features DELRIN 510GR construction, a fiber reinforced polymer especially suited to high strength situations where resistance to deflection is paramount, such as every time you shift. The Ceramitech bearings are in molded for absolute security and durability as