Sur-Ron Light Bee vs Ultra Bee

The Surron Light Bee vs Ultra Bee comparison reveals measurable differences in power output, battery capacity, and platform capability for adult riders. Sur-Ron's two most popular models represent fundamentally different approaches to electric dirt bike design.

The Light Bee X established the lightweight e-moto category when it launched, delivering 8kW peak power in a 57kg package that riders could maneuver like a mountain bike. The Ultra Bee arrived as Sur-Ron's answer to riders demanding more power, range, and suspension capability, adding 68% more peak output and nearly 50% more weight.

Core Specifications Comparison

Key considerations for surron light bee vs ultra bee buyers and enthusiasts.

The specification sheet reveals the magnitude of difference between these models. These performance characteristics directly impact the surron light bee vs ultra bee experience on the trail.

These numbers define the fundamental character of each bike. The Light Bee's 57kg curb weight sits closer to a high-end mountain bike than a motorcycle. The Ultra Bee's 85-93kg weight (depending on MX vs Road configuration) approaches traditional gas-powered dirt bikes.

Power and Acceleration

The Ultra Bee delivers 162% more peak power than the Light Bee—21kW versus 8kW. This translates to measurable differences in acceleration and sustained output.

The Light Bee X reaches 50 km/h (31 mph) in 2.7 seconds. The Ultra Bee HP model achieves 31 mph in approximately 2.0 seconds and can accelerate to 18.7 mph in just 1.1 seconds. At low speeds where electric motors deliver maximum torque, both bikes provide instant throttle response. The difference becomes apparent above 30 mph, where the Ultra Bee's higher voltage system and more powerful motor maintain acceleration while the Light Bee begins to taper.

Peak torque figures—266 N·m for the Light Bee versus 511 N·m for the Ultra Bee—represent torque at the rear wheel, not at the motor. The difference is substantial: the Ultra Bee delivers 92% more torque to the ground. Riders experience this as stronger pull from a standstill and more aggressive power delivery throughout the throttle range.

Both bikes feature dual power modes (Eco and Sport), with the Ultra Bee adding additional modes including Turbo for maximum output. The Light Bee's Sport mode delivers the full 8kW peak, while Eco mode reduces output for range extension. The Ultra Bee's Turbo mode unleashes the full 21kW, with Sport mode providing 18kW continuous output.

Battery Capacity and Range

Battery capacity directly determines range and sustained power delivery. The Light Bee's 60V 40Ah pack stores 2,400 watt-hours (2.4kWh). The Ultra Bee's 74V 60Ah pack stores 4,440 watt-hours (4.4kWh)—an 85% increase in energy storage.

Manufacturer range claims vary significantly based on riding mode and conditions. The Light Bee X claims up to 75 km (46.6 miles) in Eco mode at a constant 40 km/h. The Ultra Bee claims up to 140 km (87 miles) under similar conditions, though the 2025 HP model with increased power states approximately 70 miles in low-speed terrain.

Real-world range testing provides more useful data. Independent testing of the Ultra Bee in Sport mode on single-track trails yielded approximately 26.2 miles from 100% to 10% battery. The same bike on a motocross track delivered 19.1 miles. In Eco mode on flat dirt roads maintaining 30-35 mph, range extended to 46.3 miles.

The Light Bee's smaller battery means proportionally shorter range under equivalent conditions. Aggressive trail riding typically yields 15-20 miles, while conservative Eco mode riding can extend range to 30-35 miles.

Charging time differs due to pack size. The Light Bee charges from 20% to 80% in approximately 2 hours, with a full charge taking 3 hours using the standard charger. The Ultra Bee requires 2.5 hours for 20-80% and approximately 4 hours for a complete charge. Both bikes feature removable batteries that can be charged on or off the bike.

Suspension and Chassis

Suspension travel determines how much impact energy the bike can absorb before bottoming out or transferring shock to the rider. The Light Bee X offers 200mm (7.8 inches) of travel front and rear. The Ultra Bee provides 240mm (9.4 inches) front and rear—a 20% increase.

This 40mm difference is significant. Research on electric motorcycle suspension indicates that 160mm+ travel is designed for aggressive, steep, and technical terrain. The Light Bee's 200mm sits at the threshold of serious off-road capability. The Ultra Bee's 240mm places it firmly in the enduro/aggressive trail category.

The Light Bee uses an inverted coil spring hydraulic front fork with the Intersect TR multi-link rear suspension system, both fully adjustable. The Ultra Bee features KKE 37mm inverted forks (upgraded to a 50% stronger gold fork in the 2025 model) with upgraded damping and a KKE rear shock, also fully adjustable.

Suspension quality affects more than comfort—it directly impacts traction and control. The Ultra Bee's longer travel and more robust components allow it to maintain tire contact over larger obstacles at higher speeds. The Light Bee's shorter travel requires more precise line selection and speed modulation on rough terrain.

Ground clearance also differs: 270mm for the Light Bee versus 318mm for the Ultra Bee. The additional 48mm (1.9 inches) reduces the likelihood of frame or battery case strikes on trail obstacles. Combined with the higher seat height (830mm vs 910mm), the Ultra Bee positions the rider higher and provides more clearance for technical terrain.

Weight Distribution and Handling

The 28-36 kg weight difference between these bikes fundamentally changes their handling characteristics.

At 57 kg curb weight, the Light Bee can be lifted, maneuvered, and recovered from difficult situations with minimal physical effort. Riders report being able to pick up the bike single-handed when necessary. This low weight translates to exceptional agility—quick direction changes, easy wheelies, and minimal effort required to shift weight during cornering.

The Ultra Bee's 85-93 kg weight (MX vs Road models) requires more deliberate input. Recovery from a tip-over demands more strength. However, this weight provides stability at speed and in rough terrain. The additional mass resists deflection from trail obstacles and provides momentum that carries through technical sections. For riders researching surron light bee vs ultra bee, these specifications provide essential comparison data.

Weight distribution also matters. Both bikes position the battery low in the chassis for a low center of gravity. The Ultra Bee's larger battery and more substantial frame components raise the overall center of gravity slightly compared to the Light Bee, but the difference is less than the raw weight numbers might suggest.

For riders concerned about maneuverability, the Light Bee offers a significant advantage in tight, technical terrain where constant direction changes and bike manipulation are required. For riders prioritizing stability and momentum on faster, more open trails, the Ultra Bee's weight becomes an asset rather than a liability.

Braking Systems

Both bikes feature hydraulic disc brakes with regenerative braking systems that recover energy during deceleration.

The Light Bee X uses 203mm rotors front and rear with electric regenerative braking in Sport mode. The Ultra Bee employs larger 240mm rotors with bilateral 4-piston hydraulic calipers and a fully adjustable electric anti-lock braking system (EABS) that integrates with regenerative braking.

The Ultra Bee's 2025 model features drastically improved brakes with a 90% increase in caliper rigidity compared to previous versions. This enhancement addresses the higher speeds and greater mass that the braking system must manage.

Regenerative braking on both bikes serves dual purposes: energy recovery and extended brake pad life. The system applies motor resistance during deceleration, converting kinetic energy back into battery charge while reducing reliance on friction brakes. The Ultra Bee's more sophisticated EABS system allows finer tuning of regenerative strength and integration with the hydraulic brakes. This is a critical factor for anyone evaluating surron light bee vs ultra bee options in the current market.

For riders considering brake upgrades, the Light Bee has an extensive aftermarket with numerous rotor, caliper, and pad options. The Ultra Bee's newer platform has fewer third-party options, though the stock braking system is more capable out of the box. For comprehensive brake upgrade strategies, see our brake upgrade guide.

Modification Ecosystem

The Light Bee X has established itself as the most modified electric dirt bike platform. Years on the market have created an extensive aftermarket offering controller upgrades, battery expansions, suspension swaps, and cosmetic modifications.

Common Light Bee modifications include:

• Controller upgrades increasing peak output from 8kW to 12-15kW
• Battery capacity expansions to 50Ah or 60Ah packs
• Suspension upgrades to longer-travel forks (220-240mm)
• Wheel and tire changes for specific terrain types
• Lighting systems for street-legal conversion

The modification community around the Light Bee is well-documented, with extensive guides, forums, and vendor support. For riders new to modifications, our beginner's guide to Sur-Ron modifications provides a systematic approach to common upgrades.

The Ultra Bee, being newer and more capable in stock form, has a smaller modification ecosystem. The higher stock power output reduces the need for controller upgrades. The larger battery diminishes the urgency for capacity expansion. Most Ultra Bee modifications focus on suspension tuning, tire selection, and ergonomic adjustments rather than fundamental performance increases.

Controller modifications deserve special consideration. Upgrading the Light Bee's controller to higher output can approach Ultra Bee power levels, but this stresses the stock battery and motor beyond design specifications. For detailed controller upgrade protocols and safety considerations, see our controller upgrade guide.

Price and Value Analysis

Pricing varies by region and dealer, but the Ultra Bee typically costs 60-80% more than the Light Bee X. This price difference must be evaluated against the performance and capability increases.

The Ultra Bee delivers 162% more peak power, 85% more battery capacity, and 20% more suspension travel for approximately 70% more cost. On a cost-per-kilowatt basis, the Ultra Bee offers better value. On a cost-per-kilogram basis, the Light Bee is more economical.

However, value extends beyond raw specifications. The Light Bee's lower purchase price leaves budget for modifications, allowing riders to customize the bike to their specific needs. The Ultra Bee's higher stock capability reduces the need for immediate upgrades, potentially lowering total cost of ownership for riders who would otherwise modify a Light Bee to approach Ultra Bee performance.

Battery replacement costs also factor into long-term value. Both bikes use lithium-ion packs with finite cycle life. The Light Bee's smaller, less expensive battery will eventually require replacement, as will the Ultra Bee's larger pack. Replacement costs typically range from $800-1,200 for the Light Bee and $1,200-1,800 for the Ultra Bee, though these figures vary by region and supplier.

For riders evaluating total cost of ownership, consider the intended use case. Riders planning extensive modifications may find better value starting with the Light Bee platform. Riders seeking maximum stock performance with minimal modification will find the Ultra Bee's higher initial cost justified by reduced upgrade expenses.

Which Bike for Which Rider

The choice between Light Bee and Ultra Bee depends on rider priorities, physical size, skill level, and intended use.

Choose the Light Bee X if:

• You prioritize agility and maneuverability over raw power
• You enjoy modifying and customizing your bike
• You ride primarily tight, technical terrain where weight matters more than power
• You need to transport the bike frequently (lighter weight simplifies loading)
• You're a smaller or lighter rider (under 160 lbs)
• Budget constraints make the lower purchase price attractive
• You want a playful bike for learning advanced techniques (wheelies, jumps, trials-style riding)

Choose the Ultra Bee if:

• You need sustained high-power output for aggressive riding
• You ride faster, more open terrain where stability and momentum are advantageous
• You're a larger or heavier rider (over 180 lbs)
• You prefer stock performance without extensive modifications
• You need maximum range for longer rides
• You ride terrain demanding more suspension travel (rock gardens, larger jumps, high-speed whoops)
• You want advanced features like traction control and multiple ride modes

Neither bike is objectively "better"—they excel in different applications. The Light Bee remains the benchmark for lightweight electric dirt bikes, offering unmatched agility and a proven modification ecosystem. The Ultra Bee delivers serious off-road performance in a stock package, competing with larger displacement gas bikes in power and capability.

For riders still uncertain, test riding both models is invaluable. The weight difference and power delivery are immediately apparent, and personal preference will quickly emerge. Many dealers offer demo rides or rental programs that allow extended evaluation before purchase.

Final Measurements

The Sur-Ron Light Bee X and Ultra Bee represent two distinct points on the electric dirt bike spectrum. The Light Bee's 57 kg weight and 8kW power output create a nimble, playful platform ideal for technical terrain and modification. The Ultra Bee's 21kW output and 4.4kWh battery deliver stock performance that rivals or exceeds modified Light Bees, at the cost of 28-36 kg additional weight.

The data is clear: riders prioritizing agility, low weight, and modification potential should choose the Light Bee. Riders demanding maximum stock performance, extended range, and advanced suspension should choose the Ultra Bee.

Both bikes benefit from proper maintenance protocols. Battery care, suspension service, and brake maintenance directly impact performance and longevity. For comprehensive maintenance schedules and procedures, see our maintenance section.

If it's not measured, it's not said. These specifications are derived from manufacturer data, independent testing, and verified field measurements. Choose based on your specific use case, riding style, and performance priorities.