Adjustable Bicycle Bike Disc Brake Bracket Frame Adaptor Mounting HolderFeatures:Useful and practical.A necessity for cyclists.Refitting bracket can refit normal bicycle to updated into disc brake bicycle.Can be converted into ordinary bicycle disc brakes bicycle.Specifications:Colour: BlackMaterial: MetalMaximum installation diameter: 22MM\/0.87inch、31.8MM\/1.25inchTwo-hole distance: 51MM\/2.01inchThickness: 4MM\/0.15inchWith model 160 disc brake padCrank Weight : Approx. 73gPackage included:1 x Brake bracket