Universal Pulley Tensioner Chain Roller, 10mm Chain Roller Slider Tensioner Wheel Guide for Motorcycle Pit Dirt Mini Bike AtvDesigned as a direct replacement for the OEM designSpecially designed with the swing arm; the chain then runs over it to keep it alignedCompatible with both Upper AND Lower chain on your bikeIt is suitable for most of dirt pit bikes, street bikes, motorcycles, ATV, off road vehicles, etc