Magura hydraulic rear disc brake with child safe rotor guard.Learning to brake before pedaling is an important step in a kids mtb journey, and we believe that hydraulic disc brakes are the best option for balance bikes.Not only do they provide more power, but require far less hand strength to operate than V brakes, making them ideal for little hands. Weâ€ve also created the worldâ€s first child safe rotor guard, for parent's peace of mind.The Magura HC1 brake lever has some of the best reach adjustment on the market †meaning you can set the lever much closer to the handlebars than other brakes, a critical factor in usability for small hands with limited reach.Brake model: Magura MT4 post mountMaster cylinder material: CarbotectureBlade Lever: Magura HC1, aluminiumCaliper: Magura MT4 - Aluminium (OE version)Rotor: Storm HC 140Hose length: 750mmFluid type: Mineral oilPad: Organic