Description: Hydraulic disc brakes for mountain bike and other bikes etc. A light single-fingertip pull is all that is required in the wettest conditions on the steepest downhills. Brake lever and brake caliper material aluminum alloy, are not prone to fraying, rusting, kinking and breaking. The three-finger brake lever is designed according to the human body. It is convenient to operate the brake. Basically suitable for models on the market. Tubing: front wheel length 760mm, rear wheel length 1350mm, fits for 75mm A Pillar and 51mm B Pillar Two-way brake. Adjust the brake grip by adjusting the screw to find the right touch. Specification: Materail: aluminium alloy Size Chart: A Pillar: 75mm/2.95inch B Pillar: 51mm/2.01inch Front Tubing: 760mm/29.92inch Rear Tubing: 1350mm/53.15inch Disc: Diameter: 160mm/6.30inch Inner diameter: 45mm/1.77inch Disc brake adapter: Front fork B to A: 160mm/6.30inch; Frame B to A: 140mm/5.51inch Front fork B to A: 180mm/7.09inch: Frame B to A: 160mm/6.30inch Package Includes: 1 Set Hydraulic Disc Brake Without Disc: 1 Pair Hydraulic Disc Brakes With Disc: 1 Pair Hydraulic Disc Brakes 1 Pair Disc Brake Pads 12 Pieces Small Screws 4 Pieces Large Screws 2 Pieces Disc Brake Adapter Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 3. Wish you a wonderful on-line shopping!