The Clarks React 4 Piston Hydraulic Brake Set is a complete front and rear braking system for mountain and hybrid bikes. Its four-piston hydraulic calipers deliver strong braking force with smooth control. The set comes pre-bled and includes levers, rotors, hoses and fittings, so it is ready for installation.Key Features and Benefits:Four-piston hydraulic calipers: Four pistons apply even pressure across each brake pad. This creates high braking force and gives you firm control on steep or technical trails.Self-adjusting 16mm pistons: The caliper pistons move closer to the rotor as the pads wear. This keeps the lever feel stable and reduces the need for manual adjustment.Smooth brake modulation: The hydraulic system lets you control braking force through the lever. You can make small speed changes or apply full power without a sudden response.Pre-bled brake system: Both brakes arrive filled with mineral oil and ready for fitting. This removes the need for an initial bleed and helps reduce installation time.Adjustable lever reach: The lever position can be changed to suit different hand sizes. This makes the controls easier to reach and supports a secure grip while braking.Split-C lever brackets: The hinged clamp design fits around the handlebar without removing the grips or other controls. This makes fitting and position changes faster and simpler.Wide bike and mount compatibility: The brakes suit mountain and hybrid bikes and support international standard and post mount fittings. This allows installation on a wide range of frames and forks.Complete fitting kit: The set includes two stainless steel rotors, bolts, hoses, fittings and spare olives. The olives allow the hoses to be shortened for a neat fit on your bike.The React 4 system gives you the braking force needed to manage speed with less lever effort. Its four-piston calipers, controlled lever response and self-adjusting pistons help maintain consistent braking as conditions and pad wear change. Mineral oil provides dependable hydraulic performance and has less environmental impact than many alternative brake fluids.Choose the Clarks React 4 Piston Hydraulic Brake Set for a complete braking upgrade with strong power, simple fitting and precise control.Box Contents:X2 CalipersX2 LeversX2 Rotors and boltsX2 Hoses and all fittings