2025 SURRON ULTRA BEE HP 21KW ELECTRIC DIRT BIKE

Surron Ultra Bee HP 2025 the bike that everyone has been anticipating! The Surron Ultra Bee  – Electric Dirt Bike – the world’s most favorite electric bike brand has done it again with this outstanding new model! The Ultra offers the answer to everyone’s prayers – more power, overall size increase and low weight plus some excellent new innovations! 

Since the brand was introduction in 2016 it now boasts a suave global reputation and means fierce business and serious competition! It’s not hard to see why this world wide phenomenon is taking on the likes of the conventional petrol bikes fiercely – but take note this is by no means a street legal bicycle, this is strictly a private property use dirt bike.

Take to the trails with the Ultra Bee, which comes as standard with a 21KW Peak Output which will lay down a whopping 511nm and achieve up to 95km/h with ease! Plus with some excellent innovations such as the built in charger storage compartment under the seat, traction control and much more! The Ultra makes for the perfect outdoor expedition, trail bike, farm bike or the weekend recreational rider, which with this said is an ideal bike for almost all ages.

Conquer all trails and more with ease on the Surron Ultra Dirt Bike with 4 Piston Brakes, a Removable and Swappable 60AH Battery with premium and a seriously lightweight Aluminium construction, this is a bike that is incredibly robust but also charges in record time with the included Fast Charger of 4hrs!

2025 Ultra bee HP

Surron Ultra Bee HP 2025 Key Features:

• 74V – 60AH Lithium Battery
• Range of 140km (Cruising @40km/h)
• 21KW Motor with 511Nm of Torque
• Top Speed 95km/h
• New and Improved Fork
• Under seat charger storage

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
• New Suspension System:
  • 50% stronger gold fork with uniform wall thickness
  • Upgraded damping and hydraulic buffers for 30% better impact resistance
• 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

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.

Every PEV purchase includes a standard charger in the box. We also have fast chargers available for purchase.