The final word in Surron rear brakes.  Hopefully you're seeing this before wasting money on another set of inadequate mountain bike brakes.  This contains everything you need to get a legit rear hand brake setup. Motorcycle master cylinder and caliper.  Beefy 3mm thick, 220mm stainless steel rotor with enlarged wear patch.  Motorcycle brake lines.  Brackets custom for Surron Lite bee X. Master Cylinder (left hand, no elec. connection) Custom brake line special for Surron Lite Bee (Black) 3mm thick, 220mm custom Surron rotor with big contact patch Caliper with custom bracket (Black) Moto brake adapter bracket (Black Anodize) 2 x bolts for bracket  Why's this better than mountain bike brakes? Increased stopping power - more contact area Less Fade - thicker rotor helps dissipate heat and reduces warping Replacement pads are CHEAP and last a long time DOT brake fluid is more common Easier to bleed Safer stopping - Stock brakes are built for mountain bikes...not 130 pound e-moto's Optional Master Cylinder:  Brembo Master Cylinder Upgrade.  Functions similar to the budget master, but with the Brembo name you're familiar with.  A little softer around the edges.  Has a different brake line fitting, comes with different line from the budget version.  Still uses the same caliper and brackets as budget version.Optional Pre-Bled system: Successfully bleeding the system can be challenging.  Though this option prevents you from needing to bleed the system yourself, more significant disassembly of the surron is required including removing triple tree, motor controller and battery compartment plastics, and rear suspension linkages in order to get the caliper fed through the bike. Not compatible with Warp9 or talaria hubs.