This is a hard-wearing nylon chain tensioner runner roller for pit bikes. It comes complete with b...This is a hard-wearing nylon chain tensioner runner roller for pit bikes. It comes complete with bearings and is suitable for 420 and 428 chain sizes. The outer diameter is 29.25 mm / 1.15 inches, the width is 30.18 mm / 1.19 inches, and the runner central section diameter is 34.32 mm / 1.35 inches.
This is a hard-wearing nylon chain tensioner runner roller for pit bikes. It comes complete with bearings and is suitable for 420 and 428 chain sizes. The outer diameter is 29.25 mm / 1.15 inches, the width is 30.18 mm / 1.19 inches, and the runner central section diameter is 34.32 mm / 1.35 inches.