APLVFFZH 8mm Chain Roller Deflection Pulley, Universal Chain Roller Adjuster, Wheel Guide White.Universal chain roller adjuster can the impact between the chain and the sprocket and reduce the noise during .8mm Chain roller pulley tensioner can effectively reduce the friction between the chain and the sprocket, thereby improving efficiency and reducing power loss.Chain roller slider tensioner can keep the chain tension at a moderate level and prevent the chain from being too loose or too tight, thereby extending the chain's service life.Pulley tensioner chain roller is made of quality pp material, and the surface has been specially treated to have resistance, stylish appearance and enhance the overall beauty.Chain roller pulley tensioner can ensure that the chain runs smoothly on the sprocket and reduce chain jump tightness, thereby improving the maneuverability and stability.Chain Roller Pulley Tensioner 8mm Wheel Guide. Motorcycle Pulley Tensioner Chain Roller ATV. Chain Roller Slider Tensioner Guide Wheel. Universal Chain Roller Adjuster Motocross. Replaces Chain Roller Pulley Tensioner Premium.