2025 Surron Ultra Bee 21kw Electric Dirt Bike
Experience the 2025 Surron Ultra Bee 21kW Electric Dirt Bike—an electric powerhouse built for serious off-road performance. With advanced traction control, multiple ride modes, and up to 71.5 miles of range, shop this top-tier eMoto today at eBike Super Shop.
*Bike in a box is not assembled, tuned or road tested *Bike in a box includes manufacturers limited warranty
SurRon Ultra Bee 2025 – Now Faster!
The next evolution in electric off-road performance is here. The 2025 Ultra Bee pushes boundaries with a massive power upgrade, redesigned suspension, and high-efficiency motor tech—all while retaining the nimble ride feel SurRon is known for.
Power Upgrade – Now 21kW Peak
Tap into insane acceleration with the all-new Turbo Mode, peaking at 21kW and maintaining 18kW continuous in Sport Mode. That means 0–31mph in just 2 seconds, or a blistering 1.1 seconds to 18.7mph off the line. The 2024 outgoing model peaked at just 12.5kw. While that was plenty, this is a huge and fully welcomed upgrade!
New Features & Improvements
- Turbo Button: Unleashes full 21kW peak power
- Crawling Function: Fine control for technical off-road terrain
- Upgraded Battery: 74V60Ah for extended range and punch
- Advanced MTPA/MTPV Controller: Smarter power delivery
- Hairpin Motor: Improved efficiency & rapid heat dissipation
- 0–59mph Top Speed: Lightweight but ferocious
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New Suspension System:
- 50% stronger gold fork with uniform wall thickness
- Upgraded damping and hydraulic buffers for 30% better impact resistance
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Primary Drive Overhaul:
- Carbon fiber belt + forged pulleys
- Tungsten carbide pulley surfaces with 3x wear resistance
Range & Charging
- Range: 70 miles (at a reduced speed)
- Charge Time: 20% to 80% in just 2.5 hours
Design & Aesthetic Enhancements
- Sleek new sand-gold body color or Carbon Black
- Gold-accented front fork and guard plate decals
- New custom 18" rear wheel set
- Slight weight increase (up 8 lbs) for added durability and power delivery
- Available in Carbon Black or Desert Brown
Ride Modes
Eco / Daily / Sport / Reverse / Turbo
Plus 3-level adjustable crawling control
Specs
- Motor: PMSM w/ MTPA/MTPV Controller
- Max Power: 21kW (Turbo) / 18kW (Sports)
- Max Torque (on wheel): 376.9 ft-lbs
- Battery: 74V / 60Ah Lithium-ion
- Top Speed: 59mph
- Seat Height: 35.8 in
- Ground Clearance: 12.4 in
- Wheelbase: 54.3 in
- Frame: Forged aluminum alloy
- Front Tire: 80/100-19 Off-Road
- Rear Tire: 100/90-18 Off-Road
- Front Fork Travel: 9.4 in
- Rear Shock Travel: 3.3 in (Wheel Travel: 9.4 in)
- Throttle Curve: Three settings
- Rider Weight Capacity: 220 lbs
- Weight: 195 lbs (dry)
Smart Features
- SRTC + BERS assist systems
Local Pickup or Freight Shipping
In-store pickup is available at our San Francisco shop. Freight shipping also available—setup fees may apply for shipped bikes. We charge an optional $150 setup fee to remove from the metal crate and assemble. No freight fees to ship if you select in store pickup.
Instructions: Settings and ASR Setup
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 a letter 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 battery is under 95% in Sport mode)
- EO E5: Engine coasting regeneration
- A1 A3: Anti-Slip traction control (ASR)
- PO P1: Pause throttle when brake is applied
- 8 C1: Crash cutoff (C1 disables motor if bike tilts too far)
- F1 F3: Throttle sensitivity in Sport mode
- TO T1: Testing mode (records diagnostics)
- U1 U3: Charging speed control for utility power
How to Set Up ASR (Anti-Slip Traction Control)
1. Activating ASR
- To enable ASR for steep slopes or slippery conditions, press the ASR button three times in a row.
- The ASR light will turn green to indicate it's active.
2. ASR Strength Levels
- The right-side instrument shows ASR strength:
- One bar: Lightest assistance (still allows short wheelies)
- Three bars: Maximum traction control
3. Adjusting ASR While Riding
- To toggle ASR on/off while riding: press the ASR button three times.
- To adjust strength while riding: hold ASR and then double-click the reverse (r & s) button.
These instructions help you get the most out of your Ultra Bee’s advanced electronic systems and traction control.
| Body color |
Black, Brown |
|---|
