1、Folding Bike Chain Stabilizer: The folding bike chain stabilizer can effectively prevent the chain from falling off due to instability during riding. 2、Excellent Material: Made of aluminum alloy material, anodized color treatment, has good wear resistance and corrosion resistance. 3、Use with Guide Wheels: Adopts bearing shaft and can be matched with a variety of guide wheels, generally 11 teeth or 13 teeth can be used. 4、Adjustable Elasticity: Can remove the 5mm shaft screw, change the spring hole position of the chain guide, and adjust the elasticity of the chain guide. 5、Simple Operation: The rear derailleur chain guide is light and small, easy to install and disassemble, without additional adjustment.