ZTTO Folding Bike Chain Stabilizer Rear Derailleur Chains Guide Single Speed Adjuster Accessory

Features: This chain adjuster can change multi speed bikes into single speed bike. Spring design can fit various sizes of gear, and prevent chain from skidding out from the crank . Ensures perfect tension for your chain to make you pedal with less efforts. Suitable for folding bike with 11T or 13T rear derailleur. Lightweight and mini, easy to install and use. Specification: Material: Aluminum Alloy Color: Black & Red Fitment: suitable for folding bike with 11T or 13T rear derailleur Weight: approx. 63g Package List: 1 x Chain Adjuster