2025 Surron Ultra Bee 21kw Electric Dirt Bike
Thrilling Adventures
Experience the ultimate thrill of off-road biking with the Surron Ultra Bee, a groundbreaking electric dirt bike that blends high-performance technology with a sleek, robust design. At the heart of the Ultra Bee lies Surron's 4th-generation powertrain, nestled within a crafted aluminum alloy forged chassis. Do note there is an upcomming 2025 20kw version. Preorders will transfer over to that :)
Drawing inspiration from its illustrious predecessors, the Ultra Bee elevates electric biking performance to extraordinary heights. Its innovative powertrain offers precision handling and smooth power output, incorporating Surron's advanced off-road traction control system (SRTC). This system is designed to tackle challenging terrains, enhancing your riding experience effortlessly.
The Ultra Bee doesn't just impress with its powertrain; it boasts a refined, race-inspired braking system for unmatched stopping power on rugged trails. The unique TR rear suspension, coupled with a newly developed front suspension system, empowers riders to push their limits, enhancing speed, jumps, and overall confidence on the bike.
A testament to Surron's commitment to excellence, the Ultra Bee is engineered with insights gleaned from years of racing experience. Its optimized off-road braking system ensures a more reactive response and features a unique parking system that allows easy wheel locking with just one hand.
The Ultra Bee is a marvel of balance and innovation. Its design concept, "Balancing On the Cutting Edge," is evident in every aspect, from its even, balanced build to its trail motorcycle capabilities that suit daily commutes.
Powering this revolutionary bike is a high-performance Li-ion battery pack (4070wh), offering unparalleled power density and extended battery life. The battery maintains a low discharge temperature, ensuring reliability and continuous power delivery.
Surron's Surround Traction Control System (SRTC) is a highlight feature, offering multiple off-road traction settings at the push of a button, adaptable for any off-road condition.
Riders can choose between four riding modes: ECO, DAILY, SPORT, and Reverse, all accessible via ergonomically designed switches. The improved Reverse Mode adds more confidence, eliminating the fear of getting stuck on challenging trails.
The Ultra Bee's fully adjustable suspension system, with 240mm travel, promises utmost safety and comfort on diverse terrains, while its unique chassis design safeguards against damage during falls.
The Ultra Bee includes a hidden space under the seat for accessories for convenience. The Surron Ultra Bee comes with a 220V charger and 110V USA adapter.
Lastly, the Surron 4th generation powertrain, specifically designed for the Ultra Bee, ensures no interference between high and low voltage components, combining a 74V55AH battery pack with a 12.5KW / 440N.m torque drivetrain. This makes the Ultra Bee a lightning-fast track or trail companion, ready to push your limits to the extreme.
The Surron Ultra Bee is not just an electric dirt bike; it's a symbol of innovation, performance, and unrivaled adventure, ready to take your off-road experiences to a whole new level.
The European street legal version is pictured here. We are still unsure if the 21kw new late 2025 model will be available with the "street trim required to be street legal, including mirrors, brake lights, license plate holder/ light/ hi/low beams, speedo, and turn signals. Up to the buyer to determine street legality. Please use DirtLegal.com to get a street plate. You have to contact them, not us about this process. They do charge a fee for this plating service.
We will most likely have all models and colors available.
TECHNICAL SPECIFICATIONS
POWERTRAIN
| Motor Type | Permanent magnet synchronous motor (PMSM) |
| Peak Power | 21kw kW *There will be a newer 20kw motor / controller end of 2025 |
| Peak Torque | TBD |
| Top Speed | 90 km/h (56 mph) |
| Max Range | 140 km @ 40 km/h (87 miles @ 25 mph), depending upon terrain |
| Battery Pack | 74V/55Ah Lithium Ion |
| Charging Time | 4 Hours (0-100%) |
RIDER AIDS
| Riding Modes | Sport, Daily, Eco, Reverse |
| Rider Aids | Surron Traction Control System (SRTC), Surron Energy Regenerative System (SERS) |
| Reverse Gear | Button-activated |
CHASSIS
| Frame | Forged aluminum alloy |
| Swingarm | Forged aluminum alloy |
| Front Suspension | 37 mm inverted fork, 240 mm (9.4") travel, fully adjustable |
| Rear Suspension | Adjustable TR Intersect mono-shock, 240 mm wheel travel |
| Front Wheel | 19" wire-spoked rim, 80/100-19 off-road tire |
| Rear Wheel | 19" wire-spoked rim, 90/90-19 off-road tire |
| Front Brake | 240 mm hydraulic disc |
| Rear Brake | 240 mm hydraulic disc |
| Curb Weight | 85 kg (187 lbs) |
| Max Load | 100 kg (220 lbs) |
| Vehicle Dimensions | 79.1 x 34.6 x 46.4" (2,010 x 880 x 1,178 mm) |
| Ground Clearance | 318 mm (12.5") |
| Wheelbase | 1,380 mm (54.3") |
| Seat Height | 910 mm (35.8") |
ADDITIONAL FEATURES
| USB Connection | Single USB-2.1A Outlet (charging only)
The new 2024 Ultra Bee models do not have app support. |
| Instrumentation | LCD Digital Dash |
| Headlight | LED |
1. **Power On and Enter Settings Mode**
- With the kickstand down, power on the bike.
- Hold the Ready and ASR buttons (front facing buttons on the right and left grips) for 3 seconds until the display shows B and a number.
2. **Navigating Settings**
- **Tap ASR** to move to the next setting.
- **Tap Ready** to change the setting value.
3. **Settings Overview**
- **BO B5**: Brake regeneration (activates when the battery is under 95% in Sport mode).
- **EO E5**: Engine coasting regeneration (activates when the battery is under 95% in Sport mode).
- **A1 A3**: Anti-Slip traction control (ASR).
- **PO P1**: Pause engine throttle when the brake is on.
- **8 C1**: Crash cutoff (C1 cuts off power if the bike tilts too much).
- **F1 F3**: Throttle finesse/sensitivity in Sport mode.
- **TO T1**: Testing mode (records diagnostics while running).
- **U1 U3**: Utility power charging speed.
#### How to Set Up ASR (Anti-Slip Traction Control)
1. **Activating ASR**
- To enable ASR for riding on steep slopes and slippery roads, press the ASR button three times continuously. The ASR light will turn green to indicate it is on.
2. **ASR Strength Levels**
- The instrument on the right side displays the strength of ASR:
- One bar: Lowest level (allows wheelies for 3-5 meters).
- Three bars: Strongest level.
3. **Adjusting ASR Level While Riding**
- To turn ASR on or off while riding, press the ASR button three times continuously.
- To adjust the ASR level while riding, press and hold the ASR button, then double-click the "r & s" (reverse switch) button to change the ASR level.
These instructions ensure you can configure and utilize the Surron Ultra Bee's advanced settings for an optimal riding experience.
Pairs well with
2025 Surron Ultra Bee 21kw Electric Dirt Bike
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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