Pitbike Chain Roller Tensioner Nylon Blue 8mm Bobbin 110cc 125cc 140cc Dirtbike

Includes Bearing/s?: Yes/ Overall Length: 36 mm / 1.42 inches/ Greatest Outer Diameter (end sections): 35.88 mm / 1.41 inches/ Length of Inner Section: 16.89 mm / 0.66 inches/ Runner Central Section Diameter: 22.48 mm / 0.89 inches/ Roller Bearing Internal Diameter: 8 mm / 0.31 inches/ Diameter of Central Hole: 22 mm / 0.87 inches This part attached the the swing arm, the chain then runs over it to keep it aligned and tensioned Suitable for all pit bike and dirt bike 420 or 428 size chains. Also used on some motorized bicycle engine kits Fits lots of the big name Chinese import pit bikes including Stomp, Demon X, M2R, Lucky MX, Pitster Pro, SSR, DHZ, Piranha, Braaap, WPB, Orion and many more