Bike Rear Derailleur Pulley, 11T Ceramic Bearing Aluminum Alloy Jockey Wheel Pulley Mountain Bicycle Replacement Parts For 8/9/10/11 Speed Derailleur(Black)

【Excellent Performance】: The bike rear derailleur pulley adopts excellent manufacturing process with high reliability, the inner ceramic bearing is ultralight and owns high degree of lubrication, which can ensures its smooth working and provide you with a superior using effect. 【Scope of Application】: The 11T rear derailleur pulley is used on rear derailleur for chain transportation and speed changing, which is a necessary accessary for your bicycle and suits for 8/9/10/11 speed rear derailleur. 【Premium Quality】: The brand new bike rear derailleur pulley is made of high quality ceramic bearing + aluminum alloy material, whcich is anti-rust and corrosion resistant, sturdy and It is not easily damaged and aged, has quality and long service life. 【Easy Installation】: The 11T wheel rear derailleur pulley is easy to install, and 2 replaceable 4mm and 5mm bushing is included to enrich your installation choices. 【Guarantee】: Our product have 180 days warranty, if you have any question about this bike rear derailleur pulley, please feel to contact us, we will try our best to help you solve your problem.