Hydraulic Bike Disc Brake Kit 160mm Disc Brake Rotor Aluminum Front and Rear Caliper Disc Brake Bike Stainless Steel Rotors with 12 Bolts Bicycle Accessories Riding Equipment for Road Bike Mountain Bike Features: Fit for 22.2mm/0.87in  diameter handlebar, suitable for most mountain bike, road bike, fixed gear Bike, MTB etc. Anodized aluminum alloy frame provides strength, ruggedness, and corrosion resistance.  Dual-piston alloy calipers can provide super braking force, making the wheels rest more stable in the wet conditions or the steep downhills. Stainless Steel disc brake rotor, standard 6 bolts pattern, easy to mount on your disc brake ready frame and fork. PM/IS mount is for your optional. Suitable for long distance long term use, stable performance. Specifications: Material: Aluminum Alloy Color: Black Type: Front brake / Rear brake / Front brake + rear brake / Front brake + rear brake + 2 discs ( optional ) Front Brake Oil Tube Length: 80 cm / 31.5 in Rear Brake Oil Tube Length: 140 cm / 55.1 in Front Brake Weight: 325 g / 11.5 oz Rear Brake Weight: 343 g / 12.1 oz Brake Disc Outer Diameter: 160 mm / 6.3 in Unit Disc Weight: 104 g / 3.7 oz Package Size:  21 * 20 * 8.5 cm / 8.3 * 7.9 * 3.3 in Package Weight: 930 g / 32.8 oz   Package List:  1 * Pair of Bike Brakes 2 * Disc Brake Rotor 12 * Bolts