Vktech&reg; GUB JYG-22C Anodised CNC Ceramic Sealed Bearing Jockey Wheel 11T for Shimano/SRAM Top quality repalcements for your rear mech - even better than the standard bearings, which is saying something 11 tooth for Shimano, SRAM or Microshift High quality replacement jockey wheels at a great price Bearing: High rolling sealed bearings Superlight CNC 7075T6 AL Jockey Wheels with Ceramic sealed Bearings by GUB