Sur-Ron Ultra Bee – electric enduro motorcycle

Sur-Ron Ultra Bee is a full-size electric off-road motorcycle designed as a combination of the lightweight and agile Light Bee X construction with the greater capabilities of the Storm Bee. The Ultra Bee model features a powerful central drive, a large 74 V / 55 Ah battery, advanced suspension, and electronic systems to assist off-road riding.

In its base specification, the Ultra Bee achieves 12.5 kW of peak power, 440 Nm of torque at the wheel, and speeds of up to 90 km/h. The manufacturer states a range of up to approximately 140 km at a constant speed of 40 km/h, though the actual range depends on the terrain, temperature, rider weight, and riding style.

12.5 kW central motor

The Ultra Bee utilizes a PMSM permanent magnet synchronous central motor, controlled by an FOC Sinewave system. The maximum power is 12.5 kW, and the maximum torque reaches 440 Nm at the wheel.

The central placement of the motor allows for a favorable weight distribution and provides very direct throttle response. This is particularly important when riding technical trails, steep climbs, and demanding enduro sections.

74 V / 55 Ah battery

The motorcycle is equipped with a 74 V / 55 Ah lithium-ion battery, providing approximately 4070 Wh of energy. The battery is removable, allowing it to be charged both inside and outside the motorcycle.

The stated full charging time is approximately 4–4.5 hours, depending on the charger used and the vehicle version. There is also a dedicated space for a charger under the seat, so you can take it with you on longer trips.

Speeds up to 90 km/h

The Sur-Ron Ultra Bee can reach a top speed of approximately 90 km/h. Combined with its low weight and central drive, this results in very dynamic riding characteristics.

The manufacturer specifies a maximum range of approximately 140 km at a speed of 40 km/h. In older technical documentation, one might also find a value of 104 km at 50 km/h, which is why it is worth specifying the conditions under which the range was determined when presenting the product.

Four riding modes

The Ultra Bee offers four operating modes:

• Eco – calmer characteristics and reduced energy consumption,

• Daily – universal setting for daily riding,

• Sport – maximum dynamics,

• Reverse – reverse gear.

The motorcycle also uses the Surron Traction Control System (SRTC) and the BERS regenerative braking system. Traction control helps adjust the drive characteristics to changing surface grip.

240 mm travel suspension

One of the most important features of the Ultra Bee is the extensive suspension designed for off-road riding.

An upside-down fork with 240 mm of travel is used at the front, while the rear features a central shock absorber system with INTERSECT TR linkage, providing approximately 240 mm of rear wheel travel. The suspension is adjustable, allowing its performance to be tailored to the type of trail and riding style.

A ground clearance of approximately 318 mm allows for efficiently overcoming rocks, roots, ruts, and other off-road obstacles.

19" off-road wheels

The Ultra Bee in the off-road version uses large spoked wheels with off-road tires:

• front – 80/100-19,

• rear – 90/90-19.

The large wheels make it easier to overcome obstacles and help maintain stability during fast riding on uneven surfaces.

Hydraulic disc brakes

The motorcycle is brought to a stop by hydraulic disc brakes. The base specification uses 240 mm diameter discs at the front and rear.

The braking system works with the BERS energy recovery system, which allows part of the kinetic energy to be used during braking to recharge the battery.

Lightweight aluminum frame

The Ultra Bee uses a forged aluminum alloy frame, designed to combine high structural rigidity with weight reduction.

The weight of the base version is approximately 85 kg, making the Ultra Bee relatively lightweight for a full-size electric off-road motorcycle.

Dimensions and ergonomics

The Ultra Bee is approximately 2060 mm long, 880 mm wide, and 1178 mm high. The wheelbase is approximately 1380 mm, and the seat height is approximately 910 mm.

The 318 mm ground clearance was chosen for off-road riding and overcoming obstacles without the risk of the chassis easily bottoming out.

Technical specification

Parameters may vary depending on the Ultra Bee version and market. For example, Ultra Bee X/T/R documentation indicates different weights and permissible loads despite the use of the same drivetrain.

Key advantages of the Sur-Ron Ultra Bee

• peak power of 12.5 kW,

• torque up to 440 Nm at the wheel,

• 74 V / 55 Ah battery,

• approximately 4070 Wh of energy,

• top speed of 90 km/h,

• stated range of up to 140 km at 40 km/h,

• removable battery,

• four riding modes,

• SRTC traction control,

• BERS energy recovery system,

• PMSM central motor,

• hydraulic disc brakes,

• suspension with approx. 240 mm of travel,

• high ground clearance of 318 mm,

• 19" off-road wheels,

• lightweight forged aluminum frame,

• charger storage under the seat.

Intended use

The Sur-Ron Ultra Bee was designed primarily for off-road, enduro, and dirt riding. There are also variants prepared for road use; therefore, before purchasing, one should pay attention to the specific version, its homologation, and the equipment required for travel on public roads.

Summary

Sur-Ron Ultra Bee is an intermediate design between the compact Light Bee X and the larger Storm Bee. It offers 12.5 kW of power, 440 Nm of torque at the wheel, a 74 V / 55 Ah battery, speeds up to 90 km/h, and suspension with approximately 240 mm of travel.

Thanks to its weight of approximately 85 kg, high ground clearance, and central drive, the Ultra Bee is a design focused on dynamic off-road riding. The removable battery, four riding modes, traction control, and regeneration further increase the motorcycle's functionality.

There are various Ultra Bee models available, so when selling a specific unit, it is worth stating the exact version designation, as it can affect weight, equipment, homologation, and permissible load.