Upgrade your e-bike braking setup with the K. Mods Ultra Bee Brake Adapter + 220mm Rotor Kit, designed to adapt a Sur-Ron Ultra Bee rear brake system to compatible e-bike and e-moto platforms.
This conversion kit includes a silver CNC-machined brake adapter, 220mm rotor, spacers, and mounting hardware, giving builders the components needed to integrate larger Ultra Bee braking hardware into compatible custom builds.
Ideal for Super73, Macfox, Ridstar, ActBest, and other compatible e-bike and e-moto builds where improved braking performance and a larger rotor setup are the goal.
Features
- Designed for Sur-Ron Ultra Bee rear brake conversions
- Includes 220mm brake rotor
- 2.7mm rotor thickness
- Silver CNC-machined aluminum adapter
- Includes mounting spacers and hardware
- Allows integration of larger Ultra Bee braking components
- Designed for modified and high-performance e-bike builds
- Great for performance, stunt, and higher-power applications
- Stocked and shipped directly by K. Mods
What’s Included
- 1 × Silver CNC Ultra Bee brake adapter
- 1 × 220mm brake rotor
- 2 × mounting spacers
- Mounting hardware
Color: Silver
Rotor Size: 220mm
Rotor Thickness: 2.7mm
Rotor Sizing
The included 220mm rotor is approximately 40mm larger than the common 180mm stock rotor found on many e-bike setups.
Example:
180mm stock rotor → 220mm conversion rotor
Rotor requirements can vary by bike. Always verify rotor diameter, hub compatibility, caliper position, wheel clearance, and mounting configuration before installation.
Brake Fitment
Designed to adapt Sur-Ron Ultra Bee brake components to compatible e-bike and e-moto applications, including custom builds on platforms such as:
Super73 • Macfox • Ridstar • ActBest • Other Compatible E-Bikes
Important: Some e-bike models, including certain Macfox, ActBest, and similar platforms, may require replacing the factory brake post/adapter with a standard 180mm post-mount adapter for proper installation.
If your bike encounters this fitment issue:
180mm Post Mount Adapter on Amazon
Exact fitment depends on your bike’s mounting configuration, wheel, hub, rotor mounting pattern, and existing brake setup. This is a custom conversion component and may not be a direct bolt-on installation for every model.
Professional installation is recommended for custom brake conversions.
Direct Ship by K. Mods
In stock and fulfilled directly by K. Mods for faster processing, shipping, and product support.
Shipping, Returns & Support: Some products may be fulfilled and shipped directly by approved K. Mods suppliers. Regardless of who fulfills your order, your purchase is with K. Mods. For all order questions, returns, exchanges, fitment issues, shipping concerns, or product support, please contact K. Mods directly at hello@kmodsracing.com. Please do not contact or return products directly to the fulfilling supplier unless instructed by K. Mods. Review our Shipping Policy, Return & Refund Policy, and Terms of Service before ordering.