11T Aluminium Jockey Wheel Bicycle Rear Derailleur Pulley Guide Bearing red

Description

Anodised CNC machined bicycle jockey wheel with sealed bearing for center bolt derailleurs. 11 teeth bicycle rear derailleur accessary for Shimano/Sram/Campagnolo. Collar diameter is 4mm,5 mm and 6mm, please confirm whether suitable for your bike. Easy to install and with high strength.