Description:

Heavy-duty bearings --- Dirtbike nylon chain rollers with heavy-duty bearings are ready to use. The pulley sprocket is made of high-quality materials and is durable and long lasting.. Use --- The Chain Roller Tensioner Guide comes with a swing arm; the chain runs on it to maintain alignment. The Chain Roller can also be used in gasoline motorized bicycle conversion kits.. Size --- Chain Roller's Inner Diameter: Approx. 10mm / 0.39" Outside Diameter: 3.5cm / 1.38" Total Length: 3.3cm / 1.3".