MaceMX Ultra Bee rear brake kit for e-bikes with a standard caliper mount. Not compatible with e-moto frames- the rotor diameter won't clear.

• Rotor size - 220mm fits Super73 RX/S2/ZX/Z-Miami and Macfox/Ridstar Q20; 240mm fits GhostCat F4X, P-51 Ace/Bullet/Ranger, and Freego X2. Confirm your model before ordering.
• Pre-bled option - Brakes ship bled from the factory. Minor re-bleeding after transit is normal if the lever feels spongy — small air bubbles can enter during shipping.
• Bracket fitment - Some Macfox models and similar bikes use a non-standard brake post. A 180mm post mount adapter (sold separately) may be required to mount the bracket correctly.
• Rotor clearance - The Ultra Bee disc runs approximately 40mm wider than a stock rotor. Verify frame and caliper clearance before installing.

What's in the box:

• ultra bee rear brake assembly (pre-bled variants only)
• macemx ultra bee brake bracket
• upgraded 220mm or 240mm thickened rotor
• mounting hardware