Tensioner pulley kit, 2pcs 12T Jockey Wheel Kit Bicycle Mechanism Pulley for 5/6/7/8 Speed Derailleur Nut Washers Fittings, rear derailleur pulley

HIGH-QUALITY MATERIAL: Our rear bike hooks are made of high-quality aluminum alloy, with a smooth surface, meticulous finish, and are durable and long-lasting.

Chain Retention: The narrow and wide profiles provide incredible chain retention.

Efficient Gear Shifting: The drive pulley is made of high-quality materials, making gear shifting easy.

Extremely Quiet: Sealed bearings ensure quieter operation than derailleurs without ball bearings.