【4-Piston Hydraulic Brakes Precision】The 4-piston bike brakes with dual-directional drive boosts braking force by 50% and heat dissipation performance by 80% compared to traditional 2-piston calipers. It eliminates brake fade even on continuous downhill stretches, reduces the risk of brake failure, and enhances both braking efficiency and long-term durability. 【Silent Disc Bike Brakes】<65dB mountain bike disc brakes via resin-metal hybrid pads protect rotors. Triple-sealed CNC cylinders ensure leak-free reliability – 92% quieter than sintered competitors 【Universal Mountain Bike Compatibility】Pre-configured L-front/R-rear for MTB hydraulic brakes setups. Adjustable lever tension + AB-pillar seats fit most bikes. Front hose length: 33.5 inches (850 mm), rear hose: 63.0 inches (1600 mm) 【Bleed-Free Hydraulic Disc Brakes】Our pre-calibrated system eliminates messy bleeding. Internal routing guides and rotor spacers ensure perfect alignment. .Installation Reminder: Please remove the clamp protection piece before installation, and avoid squeezing the brake lever without a rotor or spacer in place to prevent damage. 【Pro-Grade Control Levers】Cold-forged 12° adjustable levers (100,000+ cycle tested) optimized for mountain bike hydraulic brakes and they work flawlessly with thick gloves in winter Brand Name splumzer Manufacturer splumzer Model Number Hydraulic Brake Set-2 Item Diameter 160 Millimeters Material Type Aluminum Manufacturer Part Number Hydraulic Brake Set-2 Compatible with Vehicle Type Mountain Bicycle