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A rear brake upgrade kit for the Rawrr Mantis X and X Pro electric dirt bikes. It replaces the stock rear brake with a larger caliper, lever and master cylinder, plus a custom bracket for a 220mm rotor. The kit assumes you already run a 220mm rotor; the Mantis X ships with a 203mm rotor, so that rotor must be swapped first. It suits riders who find the stock rear brake weak or fading on long descents and want more stopping power and lever feel. The trade-offs are a brake bleed with DOT 4 fluid and a rotor bolt-pattern check: pre-2025 bikes use a 44BCD mount, 2025-and-newer Mantis X uses 54BCD.
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Lowest price we've seen: $250.00 on Nov 12 at 805eMoto. Tracked across 1 store since Nov 12.
This kit upgrades the stock rear brakes on a Rawrr Mantis X or Mantis X Pro. The brakes are much larger than stock. A custom bracket is designed for a 220mm rotor and mounts onto the bike.
The kit includes the bracket, brake caliper, brake line, and brake lever/master cylinder. Several washers are included as spacers for the mount. The brakes must be bled with DOT 4 brake fluid after installation.
The kit assumes you already have a 220mm rotor. The Mantis X comes with a 203mm rotor, so it needs a 220mm rotor for this kit to work. When buying a 220mm rotor, check your bolt pattern. Pre-2025 bikes use a 44BCD pattern. The 2025 and newer Mantis X comes with a 54BCD rotor mount.