ITEM NAME:Mi Xim 11T Aluminum Alloy Mtb Bicycle Rear Derailleur Pulley Jockey Wheel E8C5 Mi Xim 11T Aluminum Alloy Mtb Bicycle Rear Derailleur Pulley Jockey Wheel E8C5 Brand Name: mi.xim Components: Derailleurs Type: Rear Derailleur Structure: Bearing Use the axis of the guide wheel screw 4/5/6MM Uses: Most of the rear derailleurs are suitable, support 7/8/9/10 speed ! colour:red Material:Aluminum alloy size:Diameter: 42mm Package Contents: 1*Bicycle Rear Derailleur Pulley