Folding Bike Derailleur Shifter Tensioner for Bike Chain Tension 2 3 6 Speed Chain Pusher Black

Installation : support single speed\/2 speed\/3 speed\/6 speed internal and external transmission can be used.Play the function of adjusting rear speed during riding. The horizontal center bearing reduces wear and tear, and at the same time increases the tension of the chain, which is not easy to drop.This product uses 7075 locking screws to increase the locking strength and strength. The return spring and the guide wheel bearing are replaced with stainless steel. There is no fear of rusting under the influence of the weather, which increases the service life.Colour: blackMaterial: aluminum alloySize: 180x70x45MMPackage Contents:1 * Folding Bike Chain GuideOnly 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.