Description: Suitable for B-pillar forks or B-pillar frame mounting After the front fork is installed, the original fork 160MM disc can be changed to 180MM disc After the frame is installed, the original car frame 140MM disc can be changed to 160MM disc or the frame that is originally a 160MM disc can be directly used as a conversion base. High quality, ultra light weight construction aluminum alloy disc brakes adapters Before buying, be sure to distinguish whether your frame is A-pillar or B-pillar. Specification: Material: Aluminum alloy Size (LxWxH): approx.8.7x1x2.4cm/3.43x0.4x0.94inch Package Includes: 1 Piece Bike Disc Brake Mount Note: Please allow slightly difference due to manual measurement