Mixim 1 PCS 13T 7075 CNC Bicycle Derailleur Jockey Wheels 13 tooth MTB Road Bike Jockey Wheel Pulley Dearing for Shimano SRAM Red 13T Bearing Pulley Jockey Wheel Rear Derailleur 13T Jockey Wheels Red color 13T Pulley Bearing Compatible for Shimano Sram