Magura eBike Brake Pressure Switch - For Magura Rim and MT Disc Brakes BlackMagura eBike Brake Pressure Switch For Magura Rim and MT Disc Brakes Black. The Magura hydraulic brake pressure motor cut off switch is specifically designed to control functions such as the on off features of the lights and motor cut off on your e bike. Pressure switch is supplied with all necessary barbed connections (barbed fittings shroud nuts olives) For use with front or rear brake Compatible with Magura MT disc brakes and HS brakes (all models