chain tensioner FORCE for singlespeed Al, black

lightweight arm with holes, length 70 mm (axle-axle)
mounting in frame drop out instead of rear derailleur
designed for singlespeed bicycles, for standart drop-outs
pulley with 11 teeth, adjustable (range aprox. 40 mm)
material of arm: alloy, material of pulley: plastic
weight: 109 g, packed in polybag