SKU CS-REACT-4-FR160AM-IS React-4: Redefining Braking for the MTB Rider. At the heart of this innovative 4 piston brake system lies a formidable 4-piston hydraulic calliper, meticulously engineered to provide unmatched stopping power and precision control. Whether navigating steep descents or tackling challenging trails, React 4 ensures powerful, reliable performance in even the most demanding conditions. Powerful 4 Piston hydraulic brake system Smooth, powerful modulated braking Self adjusting 16mm calliper pistons Split-C lever bracket design Lever reach adjustment to suit all hand sizes Suitable for MTB and Hybrid bikes Uses environmentally friendly mineral oil International standard and post mount compatible Complete brake set Stainless steel rotors Spare olives to allow for hose reduction Weight - 315g Complies with and exceeds EN15194 and ISO4210 regulations Wheel Options Front 160mm P.M./I.S. and Rear 160mm P.M./I.S. Front 180mm P.M./I.S. and Rear 160mm P.M./I.S.