Antrader Bicycle Chain Tensioners,2Pcs Bicycle Tensioners Aluminum Alloy Fasteners Single Speed Bike Chain Tensioner,Black

The chain tensioner bicycle is made of high quality aluminum alloy, wear resistance, corrosion resistance, and rust prevention., The bicycle chain tensioner adjuster is design to prevent the chain from falling off and avoid tangle,keeping the frame from scratching., Bicycle chain tensioner single speed is suitable for single bikes and fixie bike single bike regulator., Light weight and easy to install, fits 3/8" (10mm) axles, universally for folding bikes, single speed BMX,ect., You will get 2Pcs chain adjuster and 4Pcs mounting screws,make it easy for quick installation.