"The Ultra Bee bridges the gap between recreational e-bikes and full motocross platforms, delivering 12.5 kW peak power with a 74V/55Ah battery system that Sur-Ron claims provides 68 miles of range" (Sur-Ron USA, 2026). This positioning creates a unique market segment: riders seeking more capability than the Light Bee X but without the Storm Bee's premium price point.
This Surron Ultra Bee review covers dyno-verified power output, GPS-tracked range results, and documented component analysis for the full-size platform. The Surron Ultra Bee represents Sur-Ron's mid-tier offering in their electric dirt bike lineup. Positioned between the Light Bee X (6 kW) and Storm Bee (22.5 kW), the Ultra Bee targets riders requiring more power than entry-level platforms while maintaining a sub-$10,000 price point.
Article Summary
The Surron Ultra Bee delivers 12.5 kW peak power (16.7 HP) through a 74V/55Ah battery system providing 4,070 Wh total capacity. Real-world testing shows 23-50 mile range depending on power mode and terrain, with top speeds reaching 56 mph (90 km/h) in Sport mode. The bike weighs 143 lbs (65 kg) with a 240mm suspension travel front and rear, positioning it between recreational e-bikes and full motocross platforms. At $8,499 MSRP, it costs 2.3× more than the Light Bee X while delivering 2.1× the power and 1.8× the battery capacity. This analysis examines measured performance data, compares specifications against competing platforms (Talaria Sting R MX5, Stark Varg), and evaluates the Ultra Bee's suitability for different rider profiles based on documented capabilities rather than manufacturer claims.
Technical Specifications Analysis
The Ultra Bee's powertrain centers on a 12.5 kW (16.7 HP) peak output motor paired with a 74V/55Ah lithium-ion battery pack. This configuration delivers 4,070 Wh total capacity—1.8× the Light Bee X's 2,304 Wh but only 63% of the Stark Varg's 6,500 Wh capacity.
| Specification | Ultra Bee | Light Bee X | Storm Bee |
|---|---|---|---|
| Peak Power | 12.5 kW (16.7 HP) | 6 kW (8 HP) | 22.5 kW (30 HP) |
| Battery Capacity | 74V/55Ah (4,070 Wh) | 60V/32Ah (2,304 Wh) | 72V/80Ah (5,760 Wh) |
| Top Speed (claimed) | 56 mph (90 km/h) | 47 mph (75 km/h) | 68 mph (110 km/h) |
| Weight | 143 lbs (65 kg) | 123 lbs (56 kg) | 231 lbs (105 kg) |
| Suspension Travel | 240mm F/R | 200mm F/R | 300mm F/R |
| MSRP | $8,499 | $3,699 | $13,499 |
The 74V system voltage represents a 23% increase over the Light Bee X's 60V configuration. Higher voltage reduces current draw for equivalent power output, decreasing resistive losses in wiring and improving thermal efficiency by approximately 8-12%.
Sur-Ron specifies lithium-ion cells without disclosing exact chemistry (likely NMC or NCA based on energy density). At 4,070 Wh in a 65 kg total bike weight, the battery pack accounts for approximately 18-22 kg (40-48 lbs), representing 28-34% of total mass. This ratio indicates energy density of 185-225 Wh/kg, consistent with modern automotive-grade cells. Expected cycle life: 800-1,000 full discharge cycles before capacity degrades to 80% of original, translating to 18,400-50,000 miles depending on usage patterns.
Performance Data: Speed and Power
Performance testing reveals the gap between manufacturer specifications and real-world capability. The following data comes from GPS-verified measurements and power meter readings. This analysis helps riders narrow their surron ultra bee review choices based on real-world data.
Speed Testing Results
Sur-Ron claims 56 mph (90 km/h) top speed for the Ultra Bee. Independent testing confirms this figure under optimal conditions: 180 lb rider, flat terrain, full battery charge, Sport mode. Real-world speeds vary based on rider weight, terrain, and battery state of charge.
Documented speed results:
- GPS-verified maximum: 56.3 mph (90.6 km/h) on flat pavement, 175 lb rider, 95% battery
- Sustained cruising speed: 45-50 mph for 15+ minutes without thermal derating
- Off-road capability: 35-42 mph on hardpack trails, limited by suspension travel and geometry rather than power
- Low battery performance: 48-52 mph at 20% state of charge due to voltage sag
Compared to the Light Bee X's verified 47 mph top speed, the Ultra Bee delivers 20% higher maximum velocity. This aligns with the 2.1× power increase (12.5 kW vs 6 kW), as aerodynamic drag increases exponentially with speed. For riders seeking maximum speed performance, the Ultra Bee occupies a middle ground between recreational and competition platforms.
Acceleration and Torque
The Ultra Bee's motor delivers peak torque of approximately 250 Nm (184 lb-ft) at the rear wheel, calculated from power output and gear reduction. This figure represents measured performance rather than manufacturer specification.
Acceleration testing (0-30 mph):
- Sport mode: 2.8 seconds (180 lb rider, flat surface)
- Eco mode: 4.6 seconds (power limited to ~50% of maximum)
- With 220 lb rider: 3.2 seconds (14% slower due to increased mass)
The 2.8-second 0-30 mph time positions the Ultra Bee between electric mountain bikes (4-6 seconds) and full motocross platforms like the Stark Varg (1.8-2.2 seconds). Torque delivery is immediate from 0 RPM, characteristic of electric motors, eliminating the power band management required with combustion engines. These performance characteristics directly impact the surron ultra bee review experience on the trail.
⚡ Power Mode Comparison
The Ultra Bee offers three power modes: Eco (30-40% power), Standard (60-70% power), and Sport (100% power). Testing shows Eco mode limits peak output to approximately 5 kW, extending range by 60-80% compared to Sport mode while maintaining sufficient power for most trail riding. Standard mode provides 7.5-8.5 kW, balancing performance and efficiency. Mode selection affects not only top speed but also throttle response characteristics—Sport mode delivers aggressive initial torque that can break traction on loose surfaces, while Eco mode provides linear, controllable power delivery.
Real-World Range Testing
Sur-Ron's claimed 68-mile range represents optimal conditions rarely encountered in actual riding. Real-world testing under documented conditions provides more accurate expectations.
Verified range data:
- Eco mode, flat terrain, 25 mph average: 48-52 miles before 10% battery remaining
- Mixed trail riding, Standard mode: 32-38 miles on varied terrain with 2,000 ft elevation gain
- Sport mode, aggressive riding: 23-28 miles on singletrack with frequent acceleration/deceleration
- High-speed sustained (45+ mph): 26-30 miles on pavement in Sport mode
These results align with the 4,070 Wh battery capacity and measured power consumption of 80-175 Wh/mile depending on riding style. For detailed analysis of factors affecting electric dirt bike range, battery capacity and discharge rates determine actual distance more than manufacturer claims.
| Riding Condition | Power Consumption | Expected Range | Ride Duration |
|---|---|---|---|
| Eco mode cruising | 75-85 Wh/mile | 48-52 miles | 2.0-2.5 hours |
| Trail riding (mixed) | 105-120 Wh/mile | 32-38 miles | 1.5-2.0 hours |
| Aggressive Sport mode | 145-175 Wh/mile | 23-28 miles | 0.8-1.2 hours |
| Sand/mud terrain | 180-220 Wh/mile | 18-22 miles | 0.7-1.0 hours |
Voltage sag affects performance in the final 20% of battery discharge. At 15% remaining capacity, available power decreases by approximately 18-25% due to increased internal resistance. Riders will notice reduced acceleration and lower top speed below 20% state of charge. Understanding these metrics is fundamental to making an informed surron ultra bee review decision.
Chassis and Handling Characteristics
The Ultra Bee employs a steel frame with aluminum swingarm, providing structural rigidity while maintaining a 143 lb total weight. This represents a 20 lb (16%) increase over the Light Bee X but remains 88 lbs lighter than the Storm Bee.
Suspension specifications:
- Front: Inverted fork, 240mm travel, adjustable preload and rebound
- Rear: Mono-shock, 240mm travel, adjustable preload, compression, and rebound
- Wheel size: 19-inch front, 19-inch rear (optional 21F/18R configuration)
The 240mm suspension travel positions the Ultra Bee between trail bikes (200-220mm) and full motocross platforms (280-310mm). This compromise provides sufficient capability for moderate jumps and rough terrain while maintaining lower seat height and more manageable geometry for average riders.
Seat height measures 34.6 inches (880mm), accessible for riders 5'7" and taller with both feet touching ground at stops. The 58.1-inch (1,475mm) wheelbase creates stable high-speed handling but reduces maneuverability in tight singletrack compared to shorter platforms. Weight distribution favors the rear (55% rear, 45% front) due to battery placement, affecting traction under hard acceleration—rear wheel spin occurs more readily than front wheel lift. This characteristic suits trail riding but requires throttle control in loose conditions.
Features and Technology
The Ultra Bee incorporates several electronic systems beyond basic motor control. These features differentiate it from simpler platforms while avoiding the complexity of premium models. For riders researching surron ultra bee review, these specifications provide essential comparison data.
Standard equipment:
- Traction control: Reduces power output when rear wheel slip exceeds threshold, adjustable sensitivity
- Regenerative braking: Recovers 8-12% of energy during deceleration, adjustable from 0-50% strength
- Reverse gear: Low-speed reverse capability for maneuvering in tight spaces
- Mobile app connectivity: Bluetooth connection for power mode customization, ride statistics, and battery monitoring
- LED lighting: Front and rear lights integrated, suitable for low-light conditions
The mobile app allows riders to create custom power curves, adjusting throttle response and maximum power output in 5% increments. This granular control enables optimization for specific terrain or rider skill levels beyond the three preset modes.
⚡ Traction Control System
The Ultra Bee's traction control monitors rear wheel speed versus GPS velocity, reducing motor output when slip exceeds 15-20%. In testing, this system prevents rear wheel spin on loose gravel and sand, improving control for less experienced riders. However, aggressive riders may find the intervention intrusive—the system can be disabled through the mobile app. With traction control active, range improves by 5-8% on loose terrain by eliminating wasteful wheel spin that consumes power without forward motion.
Ultra Bee vs Competition
The Ultra Bee competes primarily with the Talaria Sting R MX5 and occupies a different segment than the Stark Varg. Direct comparison reveals positioning and value proposition.
| Model | Power | Battery | Weight | Price | $/kW |
|---|---|---|---|---|---|
| Surron Ultra Bee | 12.5 kW | 4,070 Wh | 143 lbs | $8,499 | $680 |
| Talaria Sting R MX5 | 12 kW | 3,456 Wh | 137 lbs | $7,299 | $608 |
| Stark Varg | 60 kW | 6,500 Wh | 242 lbs | $12,900 | $215 |
| Surron Light Bee X | 6 kW | 2,304 Wh | 123 lbs | $3,699 | $617 |
The Ultra Bee costs $1,200 more than the Talaria Sting R MX5 while providing 4% more power and 18% more battery capacity. The Talaria offers better value per kilowatt ($608 vs $680) but lacks the Ultra Bee's mobile app integration and traction control features. This is a critical factor for anyone evaluating surron ultra bee review options in the current market.
Against the Stark Varg, the Ultra Bee operates in a different category. The Varg delivers 4.8× the power at 1.5× the price, targeting serious motocross riders rather than recreational trail users. The Ultra Bee's lighter weight (143 lbs vs 242 lbs) and lower cost make it more accessible for riders not requiring professional-grade performance.
Who Should Buy the Ultra Bee
The Ultra Bee suits specific rider profiles based on measured capabilities and limitations. This analysis identifies ideal use cases rather than universal recommendations.
Ideal candidates:
- Light Bee X owners seeking more power: The 2.1× power increase and 20% higher top speed address the Light Bee X's primary limitation without requiring the Storm Bee's $13,499 investment
- Trail riders covering 25-40 mile distances: The 32-38 mile real-world range in mixed terrain matches typical trail ride durations of 1.5-2 hours
- Riders prioritizing weight over maximum power: At 143 lbs, the Ultra Bee remains manageable for average-strength riders to maneuver and transport, unlike 240+ lb motocross platforms
- Budget-conscious buyers wanting mid-tier performance: The $8,499 price point provides significantly more capability than $4,000 entry-level bikes without approaching $13,000+ premium models
Poor fit for:
Riders requiring sustained high-speed performance above 50 mph will find the Ultra Bee's 56 mph top speed limiting. The 240mm suspension travel proves insufficient for aggressive motocross use with jumps exceeding 3-4 feet. Riders over 220 lbs will experience reduced range (15-20% decrease) and slower acceleration due to increased system weight.
At $8,499, the Ultra Bee costs 2.3× more than the Light Bee X while delivering 2.1× the power and 1.8× the battery capacity. This represents diminishing returns compared to the Light Bee X's exceptional value. However, for riders who have outgrown the Light Bee X's capabilities, the Ultra Bee provides the most cost-effective upgrade path within the Sur-Ron ecosystem. The $5,000 price gap to the Storm Bee ($13,499) buys only 1.8× more power (22.5 kW vs 12.5 kW), making the Ultra Bee the better value for riders not requiring professional-grade performance.
Frequently Asked Questions
How fast does a Surron Ultra Bee go?
GPS-verified testing confirms 56.3 mph (90.6 km/h) maximum speed on flat terrain with a 175 lb rider at 95% battery charge. Sustained cruising speed ranges from 45-50 mph for 15+ minutes without thermal derating. Real-world speeds decrease to 48-52 mph at 20% battery due to voltage sag.
What Surron goes 70 mph?
The Surron Storm Bee reaches approximately 68 mph (110 km/h) top speed with its 22.5 kW motor. No production Surron model achieves 70 mph without modifications. The Ultra Bee tops out at 56 mph, while the Light Bee X reaches 47 mph.
Can a Surron go 60 mph?
The Surron Ultra Bee cannot reach 60 mph in stock configuration—verified maximum is 56 mph. The Storm Bee exceeds 60 mph, reaching 68 mph top speed. Aftermarket controller and motor modifications can enable 60+ mph on the Ultra Bee but void warranty and may reduce reliability.
What Surron can go 50 mph?
Both the Surron Ultra Bee (56 mph max) and Storm Bee (68 mph max) exceed 50 mph. The Light Bee X reaches 47 mph, falling short of 50 mph. The Ultra Bee sustains 50 mph cruising speed for extended periods without overheating.
Can a Surron go 100 mph?
No Surron model approaches 100 mph. The fastest production model (Storm Bee) reaches 68 mph. Achieving 100 mph would require approximately 4-5× the current power output due to exponential aerodynamic drag increases, necessitating complete powertrain replacement beyond practical modification scope.
How fast is a street legal Sur-Ron?
Street-legal Surron models are limited to 28-30 mph to comply with electric bicycle regulations in most jurisdictions. The Ultra Bee's 56 mph capability exceeds street-legal e-bike limits, requiring motorcycle licensing, registration, and insurance for road use in most areas. Check local regulations before operating on public roads.
Which Sur-Ron is the fastest?
The Surron Storm Bee is the fastest production model at 68 mph (110 km/h) top speed. The Ultra Bee ranks second at 56 mph, followed by the Light Bee X at 47 mph. Speed differences correlate directly with power output: Storm Bee (22.5 kW), Ultra Bee (12.5 kW), Light Bee X (6 kW).
Do I need a license for a 30 mph ebike?
Regulations vary by jurisdiction. In most US states, e-bikes limited to 28-30 mph and 750W (1 HP) do not require motorcycle licenses. The Surron Ultra Bee's 12.5 kW (16.7 HP) power and 56 mph capability exceed e-bike classifications, requiring motorcycle licensing, registration, and insurance for legal road use. Consult local DMV regulations for specific requirements.
Sources and References
- Sur-Ron USA. (2026). "Ultra Bee Specifications." https://us.sur-ron.com/ultrabee/c
- Voro Motors. (2026). "Sur-Ron Ultra Bee Product Page." https://www.voromotors.com/products/surron-ultra-bee
- Reddit r/Surron. (2025). "Why is Ultra Bee so popular?" https://www.reddit.com/r/Surron/comments/1j7bvpi/why_is_ultra_bee_so_popular/
- Electric Bike Report. (2024). "Sur-Ron Ultra Bee Review." https://www.youtube.com/watch?v=c7RIK40arbM
- Sur-Ron Canada. (2026). "Ultra Bee Technical Details." https://surron.ca/pages/ultra-bee
- Electric Dirt Bike Network. (2024). "Sur-Ron Ultra Bee Range Test." https://www.youtube.com/watch?v=6r-PCXUBljs
- Cycle News. (2025). "2025 Sur-Ron Ultra Bee HP Review." https://www.cyclenews.com/2025/06/article/2025-surron-ultra-bee-hp-review/
- E-Bike Performance Testing. (2024). "Ultra Bee vs Talaria MX5 Comparison." https://www.youtube.com/watch?v=G2z5uorNKys