Ultra Bee Rear Brake Kit for E-Bikes

Upgrade your e-bike with powerful Ultra Bee braking and a 220mm rear rotor. Built for high-power e-bikes and e-moto-style builds that need more braking performance than typical stock bicycle brakes.

Why Our Ultra Bee Brakes?

220mm oversized rear rotor
Powerful hydraulic braking
Improved braking control and feel
Pre-bled and ready to install
Includes mounting bracket and hardware
Designed for high-power e-bike builds

What's Included

Ultra Bee rear hydraulic brake assembly
Brake lever & master cylinder
Hydraulic brake line
Rear caliper
220mm rear rotor
ER Moto mounting bracket
Mounting hardware

Fitment

Compatible with many popular high-power e-bikes, including:

Super73: ZX, RX, S2
Macfox: X1, X1S, X2, X7
Ridstar: Q20, Q20 Pro, E26
Zooz: Ultra Urban / UU
Freego & other compatible e-bikes

Fitment can vary by model and configuration. Some bikes may require an additional brake adapter. If you're unsure whether it fits your bike, contact us before ordering.

Important

Professional installation is recommended if you're not experienced with hydraulic brakes. Always verify brake function and rotor/caliper clearance before riding.

Upgrade your brakes now. — ER Moto