Rear Brake Assembly Surron Ultra Bee (Complete) – OEM Quality
Rear Brake Assembly Surron Ultra Bee (Complete) – OEM Quality
- Complete rear brake assembly OEM quality for Sur-Ron Ultra Bee. Includes all components needed for replacement or repair – factory fit, reliable braking performance. Direct replacement, no modifications needed.
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A complete rear brake system for the Sur-Ron Ultra Bee in OEM class. This is not a box of parts to assemble — you get a finished unit: components are joined, filled with brake fluid and professionally bled. Take it out, bolt it on, check lever travel and ride.
The same assembly is one of the most frequently bought upgrades for the Sur-Ron Light Bee. The stock Light Bee rear brake runs out of bite under aggressive riding, stunting and after a controller upgrade. The Ultra Bee system uses a larger caliper and handles heat far better. For a Light Bee you need two items though — this one and the conversion kit. The table below says exactly what to order.
What to order for your machine
| Your machine | What you order | Why |
|---|---|---|
| Sur-Ron Ultra Bee | This assembly alone | The caliper adapter for the Ultra Bee swingarm is included. Bolt-on, no modification. |
| Sur-Ron Light Bee X / L1e | This assembly + conversion kit | The conversion adds a CNC 7075 adapter, disc guard and a 240 mm disc matched to Light Bee geometry. |
| You only need a disc or pads | Separate items in the shop | This assembly is the hydraulics: master cylinder, caliper, line, adapter. No disc inside. |
The most common ordering mistake: a Light Bee owner buys this assembly on its own and then finds there is no way to mount the disc. A Light Bee X / L1e build needs two items — this one and the conversion kit (linked below).
What is in the box
Master cylinder
With an ergonomic handlebar lever, ready to fit.
Caliper with pads
Pads are already installed — nothing extra to buy to get rolling.
Brake line
Correct length, increased pressure resistance.
Caliper adapter
Dedicated to the Sur-Ron Ultra Bee swingarm.
What is not included
Brake disc and disc guard. On an Ultra Bee you keep the factory ones. For a Light Bee conversion the 240 mm disc and the guard come with the conversion kit — linked in the section below.
Specification
| Model | Sur-Ron Ultra Bee |
| Position | Rear brake system |
| Type | Hydraulic, complete assembly |
| Class | OEM replacement |
| Delivery state | Assembled, filled with fluid, bled |
| Contents | Master cylinder + caliper with pads + line + adapter |
| Fitting on Ultra Bee | Bolt-on, no modification |
| Fitting on Light Bee X / L1e | Requires conversion kit |
Figures the manufacturer does not publish — piston diameter, torque values, the fluid type used for factory filling — we do not guess. Message us and we will check a unit in the showroom and reply.
Master cylinder + caliper + lineAdapter includedFilled and bledBolt-on Ultra BeeLight Bee upgrade
Before you order
- On an Ultra Bee this is a direct fit — you need nothing else.
- For a Light Bee X / L1e add the conversion kit, otherwise the disc cannot be mounted.
- The brake disc is not part of this set.
- Pads sit in the caliper. A spare set is a separate item.
Frequently asked questions
Does it fit the Sur-Ron Light Bee?
Not directly. The adapter here is cut for the Ultra Bee swingarm. For a Light Bee X / L1e you add the conversion kit — CNC 7075 adapter, disc guard and 240 mm disc. Only together do they make a working system.
Do I have to bleed it after fitting?
Normally no. The system arrives filled and bled. After bolting it on you check fluid level and lever travel.
Is the disc included?
No. On an Ultra Bee the factory disc stays. For a Light Bee conversion the 240 mm disc comes with the conversion kit.
Why replace a working stock Light Bee brake?
Because it stops being enough after a controller upgrade, during stunting and on long descents. The larger Ultra Bee caliper brakes harder and heats up more slowly.
Can I get fitment confirmed before buying?
Yes. Send us your model and year and we will tell you exactly what to order.
Complete the build
Not sure what to order?
Send us your model and year. We will confirm the full list before you place the order.
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