This single speed converter is very suitable for the bicycle that suits for mountainous terrainThe floating pulley and spring adjustment can achieve perfect chain tensionThis bike chain tensioner is lightweight and easy to installMade of high-quality aluminum alloy, this bicycle chain tensioner is durableSuitable for people who like cyclingThis product is made of aluminum alloy material and processed by CNC technology. The product is lightweight and has improved strength. The hollow design, exquisite workmanship, anodized, and engraved LOGO can prevent the chain from falling off and reduce the tooth feel.Type:Chain TensionerTheme:SportsFeatures:Easy to UseSports Type:CyclingColour:blackMaterial:Aluminum alloySize:90 x 57 x 54MMPackage Contents:2 x Bike Chain TensionerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.