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Stealing the Show: The Surron Hyperbee Demo Race at AUSX Open
The 2025 AUSX Open wasn't just about the 450s. We witnessed the Surron Hyperbee tackle a pro supercross track in Melbourne. Here is why this electric lightweight is the real deal for new riders.
Why Halloween Season Is the Perfect Time to Buy an Electric Bike
Learn why Halloween season is the perfect time to buy an electric bike: Mild fall weather for rides to pumpkin patches or trunk-or-treat, nonstop short trips that e-bikes simplify, and early brand sales (price-guaranteed through Black Friday). Discover Go4eMobility’s deals—from the under-$600 Lasmy Mini to family-friendly cargo e-bikes and stylish retro models—and start enjoying rides before winter hits.
Surron Light Bee X vs Bikonit Raptor BK-28
Short version: The BK-28 is targeted at riders seeking raw power and value. The LightBee X (LBX) is aimed at riders desiring lightweight agility and refined control. The following provides a more in-depth, scientific explanation of why these differences are significant, where each model excels, and how to assess real-world range, handling, and longevity. Specifications & quick comparison Spec Bikonit Raptor BK-28 Surron Light Bee X Peak power (kW) 21 kW 8 kW Battery 72 V × 30 Ah = 2160 Wh 60 V × 40 Ah = 2400 Wh (typical) Top speed ~85 km/h (52 mph) ~75 km/h (46 mph) Weight ~69 kg (152 lb) ~57–58 kg (125–128 lb) Controller Sine-wave FOC sine-wave (better low-speed modulation) Unique features NFC unlock, high torque Regenerative braking, removable battery Price (typical) ~USD $4,699 ~USD $4,699 The physics of what you feel on the trail Motor power vs torque — not the same thing Power (kW) represents the amount of work per unit time that the motor can perform; a higher kW value indicates a higher potential top speed and more continuous power. Torque (N·m) is the rotational force at the motor shaft and is responsible for initial acceleration and hill-climbing ability. High torque gives an immediate push from a standstill; high power enables continuous acceleration at speed. Practical takeaway: The BK-28's significantly higher peak power and reported high torque result in stronger launches and better performance on steep grades. The LBX, with lower peak power but a lighter mass, will feel more nimble and easier to maneuver mid-air and on narrow trails. Controller type — how the bike “applies” the power Sine - wave controllers smooth the current to reduce audible noise and heat compared to crude square-wave controllers. FOC (Field - Oriented Control) takes it a step further: it treats the motor as a vector quantity, controlling current in two axes to produce smoother, more efficient torque and better low - speed modulation. Why it matters: FOC (used on the LBX) provides precise throttle control for technical trail riding and improves the smoothness of regenerative braking; a sine - wave controller on a high-power bike (like the BK-28) is robust and simple but may lack the finesse for low-speed trail handling. Battery capacity, usable energy, and range math — a reproducible check To compare batteries in a reproducible manner, convert voltage × amp-hours to watt-hours (Wh). Then estimate the consumption (Wh/km) for off - road riding. Digit - by - digit: BK- 8 battery: 72 V × 30 Ah = 72 × 30 = 2160 Wh (2.16 kWh). LBX battery (example spec 60 V × 40 Ah): 60 × 40 = 2400 Wh (2.4 kWh). Range estimate: If an off-road ride averages 30 Wh/km (moderate mixed terrain), then: BK-28 theoretical range ≈ 2160 Wh ÷ 30 Wh/km = 72 km. LBX theoretical range ≈ 2400 Wh ÷ 30 Wh/km = 80 km. However, real-world range varies rapidly depending on riding style: aggressive high - torque riding can easily double the Wh/km to 60–80 Wh/km, halving the range. Manufacturers' quoted ranges are often measured in conservative eco-modes or on flat trails; always consider the quoted numbers as best-case or partial-use figures. Chassis, suspension and handling Mass, rotational inertia & handling Heavier bikes (higher mass, heavier rotating wheels) increase rotational inertia, making it more difficult to initiate or stop direction changes and wheel spin. This is why the lighter LBX feels more maneuverable on singletrack and during jumps. The heavier mass of the BK-28 is an advantage for maintaining momentum over rough, rutted terrain and for stability at high speed; it also enhances traction under power. Suspension travel and tuning Longer travel with proper damping helps dissipate energy from large impacts (drops, rocks) — crucial for aggressive off-road riding. However, the quality of damping (valve design, compression/rebound tuning) is as important as the travel length. The BK-28 uses long - travel components designed for heavy impacts; the LBX uses lighter multi-link setups tuned for agility and quicker recovery. For riders: adjust sag and damping according to your weight and riding style, not the “factory” settings. Thermal management & reliability High-power motors and controllers generate a significant amount of heat; sustained high loads without adequate heat dissipation will trigger power limits or cause failure. Look for heat sinks, airflow pathways, and thermal monitoring in the spec sheets. Battery longevity depends on charge/discharge rates (C-rate) and temperature. Higher continuous current draw shortens the cycle life; a good BMS (Battery Management System) with cell balancing, over-temp and over-current protection is essential. Practical check: Ask dealers about sustained climb tests and whether the bike has thermal cutback (automatic power reduction) — this is a reliability feature, not a defect. Control features that change rideability Regenerative braking: Recovers energy, smooths deceleration, but excessive regen can destabilize a dirt bike on loose surfaces. The LBX's regen is usually tunable, which is beneficial for rider customization. Ride modes & throttle mapping: Allow for tailoring of power delivery (Eco, Sport, Traction control). Finer mapping (possible with FOC controllers) improves traction on variable terrain. Security & convenience: NFC unlock and remote features (BK-28) are modern conveniences—useful for fleets or shared use. Maintenance, parts ecosystem & resale Aftermarket support & parts availability directly impact downtime and long-term costs. Surron has a larger established dealer and parts network in many countries; the BK-28 (Bikonit) may be more value - oriented but may require import/aftermarket sourcing depending on the region. Wear items: Chain/sprockets, brake pads, bushings, and suspension seals need periodic inspection—plan a maintenance schedule based on hours ridden, not calendar weeks. Who should buy which Choose the BK-28 if: You prioritize raw acceleration, top speed, and climbing (high torque + big motor). You want the best power-for-dollar and plan longer high-speed rides or aggressive routes. You are comfortable with a heavier, momentum - based bike. Choose the Surron Light Bee X if: You value agility, precise low-speed control, and brand support. You ride technical singletrack, jumps, or prefer a bike that is easy to handle at lower skill levels. You prefer a more established dealer/service network. Conclusion Make a decision by matching the measured physical demands (route profile, expected speed, frequency of high-load bursts) to the bike's energy capacity, torque profile, and thermal management. The BK-28 offers machine-level power and climbing ability; the LBX provides controllability and a lighter platform. Both are excellent for different scientific use-cases — choose the bike whose physical characteristics align with the physics of your riding style.
Surron 2025 LightBee X vs HyperBee | 2025 Full Specs Comparison
Compare Surron’s latest HyperBee models with the LightBee X. Explore differences in seat height, weight, range, and ground clearance. Shop the best electric off-road bike for you.
What is a Permanent Magnet Synchronous Motor (PMSM)?
Introduction In today's electromechanical systems, Permanent Magnet Synchronous Motors (PMSMs) have become very important. They're used in industrial machines, new-generation electric vehicles (EVs), and motorcycles. People like PMSMs because they're precise, efficient, and take up little space. This blog will tell you what PMSMs are, where they're used, how they compare to other motors, and why vehicles like the Surron LightBee X and Bikonit Raptor BK-28 use them for better performance. What is a Permanent Magnet Synchronous Motor (PMSM)? A Permanent Magnet Synchronous Motor (PMSM) is a type of AC motor. In contrast to having windings or electromagnets in the rotor, it is equipped with permanent magnets. Induction motors require an external power source to generate a magnetic field in the rotor. However, PMSMs possess a fixed magnetic field due to the built-in permanent magnets. This design enables the rotor to rotate at the same speed as the stator's magnetic field, facilitating precise control of the motor's speed and power. The main components of a PMSM are: Stator: It features three - phase windings. When an electric current is passed through these windings, they generate a rotating magnetic field. Rotor: It contains permanent magnets. Typically, these magnets are fabricated from rare - earth materials such as neodymium, which exhibit high magnetic strength. Control Systems: Advanced techniques such as Field-Oriented Control (FOC) or direct torque control (DTC) are employed. These techniques regulate two types of currents to ensure the smooth operation of the motor. Key Applications of PMSM Permanent Magnet Synchronous Motors (PMSMs) are commonly employed in applications that demand high efficiency, compact size, and excellent control capabilities. Some of the primary applications include: Industrial Machinery: PMSMs are utilized in Computer Numerical Control (CNC) machines, robots, and conveyor systems, where precise motion control is of utmost importance. Electric Vehicles (EVs): They serve as the power source for battery - operated trains and small electric vehicles. PMSMs help mitigate energy loss issues and extend battery life. Direct - Drive Systems: PMSMs are applied in electromechanical actuators and wind turbines. The use of PMSMs eliminates the need for gear trains, simplifying the machine's design. High - Performance Motorcycles: Motorcycles such as the Bikonit Raptor BK-28 are equipped with PMSMs due to their quick response and high energy efficiency. PMSM vs. Other Motor Types: A Technical Comparison Permanent Magnet Synchronous Motors (PMSMs) enjoy high popularity, yet other motor types such as Brushless DC (BLDC) motors and induction motors are still in service. Understanding the distinctions among them enables us to comprehend why PMSMs are superior: PMSM vs. BLDC Motors Control Complexity: BLDC motors employ a simpler current - control method, rendering them more cost - effective for basic applications. In contrast, PMSMs utilize a more advanced control approach (Field-Oriented Control, FOC) to achieve smoother power delivery, thereby reducing vibration and noise. Efficiency: PMSMs generally exhibit higher efficiency, particularly when the motor is operating at partial load. BLDC motors may not perform as well when precise speed control is required. PMSM vs. Induction Motors Rotor Excitation: Induction motors generate a magnetic field in the rotor through induced currents, which results in energy losses. PMSMs utilize permanent magnets, thus avoiding this issue and offering higher efficiency. Power Density: PMSMs can deliver more power within a smaller volume, making them well-suited for applications such as electric vehicles (EVs) and motorcycles where weight is a critical factor. Induction motors are powerful but larger in size and less efficient at low speeds. Advantages of Permanent Magnet Synchronous Motors PMSMs are better than other motors in several ways: 1. High Efficiency and Power Density PMSMs don't lose energy when creating a magnetic field in the rotor. So, they can turn more electrical energy into mechanical power. Their small size and high efficiency make them a top choice for systems where saving weight and energy is important. 2. Advanced Control Capabilities PMSMs can use advanced control methods like FOC. This method allows the motor to control the magnetic field and the power separately. This makes it easy to adjust the speed and power precisely, which is very important for things like robots and electric vehicles. 3. Sensorless Operation Modern PMSMs can work without position sensors. They use special techniques to figure out where the rotor is. This reduces the number of parts and the cost of maintenance, especially in some designs. 4. Reliability Unlike traditional DC motors that have parts that wear out easily, PMSMs don't have such parts. Their solid - state rotor design makes them last longer, especially in high-speed or high - power situations. Why PMSM in Electric Vehicles and Motorcycles? PMSM in Electric Vehicles: Tesla Model 3 Example Tesla Model 3, a flagship electric vehicle in the U.S.market, integrates PMSM technology to optimize performance in battery-powered driving scenarios.The Model 3’s PMSM motor delivers high torque at low speeds, which is critical for responsive acceleration in urban and highway driving.Additionally, the motor maintains efficiency during dynamic load variations—such as climbing hills or navigating uneven terrain—by minimizing energy losses in the rotor’s magnetic field generation 1.This design aligns with Tesla’s focus on lightweight performance and extended range, as the 2023 redesigned Model 3 (Project Highland) achieved a ~10% increase in range through aerodynamic improvements and energy-efficient drivetrain components. PMSM in Motorcycles: The Lightbee X & BK-28 Example For motorcycles like the Surron lightbee X and Bikonit Raptor BK-28, PMSMs respond quickly and waste little energy. These are important for fast and high-performance bikes. Their ability to work without sensors simplifies the design. And the strong performance of PMSM - based systems (made better by advanced control methods) ensures that the bike is stable when accelerating or decelerating quickly. This makes PMSMs a great choice for motorcycles that need to be efficient and reliable. Conclusion Permanent Magnet Synchronous Motors (PMSMs) are changing electromechanical systems. They're efficient, small, and easy to control. They're used in industrial machines, electric motorcycle like the Surron LightBee X and Bikonit Raptor BK-28. They solve problems like energy loss, parts wearing out, and the need for precision. As more people want lightweight and high-power systems, PMSMs will become even more important in future vehicle and industrial designs.
Twist or Thumb? Throttle on Lightweight Folding Electric Bike Under $800
Explore the differences between twist throttle and thumb throttle on electric bikes, focusing on the LASMY MINI Folding Electric Bike and affordable, lightweight folding ebikes under $800.
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Sur-ron Ultra Bee 2024
$5,199.00
$6,599.00
-21%
519900
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calculated at checkout.
Limited Time Offer
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Sur-ron Ultra Bee 2024
$5,199.00
$6,599.00
519900
$5,199.00
$6,599.00
519900
12500W
Peak Power
440N.m
Peak Torque
56Mph
Top Speed
Product Details
The Industry Disruptor: Proven Performance for Every Terrain
The 2024 Surron UltraBee is the machine that bridged the gap between lightweight electric bikes and traditional gas-powered enduro motorcycles. It remains the gold standard for riders seeking a versatile, high-performance electric dirt bike. Designed to handle everything from aggressive trail riding to urban commuting, the 2024 model offers a perfect synthesis of power, weight, and range. It is a tested, reliable, and adrenaline-pumping platform that dominates the middleweight category.
Key Features & Benefits
- ⚡ Class-Leading Power-to-Weight Ratio
- 🔋 Innovative 74V Power System
- 🧠 SRTC (Surron Traction Control) System
- 🛠️ Fully Adjustable Suspension & Braking
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Intelligent Control
Experience surgical precision with the advanced MTPA & MTPV control algorithms. This smart system optimizes battery output for smooth torque delivery, wider speed ranges, and superior traction control on any terrain.
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Off-Road Suspension
Dominate the trails with a fully adjustable suspension system. Featuring 240mm of travel, the inverted front fork and TR rear shock absorb heavy hits, offering maximum stability and confidence on technical jumps.
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Hairpin Motor Tech
Unleash raw power with 4th-gen Hairpin winding technology. This high-efficiency motor reduces heat and resistance, delivering massive torque density and a blistering 0-30 mph time of just 2.3 seconds.
Why Choose Go4e
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LightBee Dimensions
Seat Height
850 mm
Wheelbase
1380 mm
Ground Clearance
315 mm
Length
2080 mm
Technical details
Performance
Frame&Tire
Performance
Specifications
Specifications
Power System
Power System
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