ASUS has introduced the Oxiis E250G1 Intelligent Bike Booster, a compact system for adding electric assistance to existing bicycles.
The device can turn a compatible conventional bicycle into an e-bike without replacing its wheels or drivetrain. It also does not require changes to the bicycle’s brakes.
Instead, the system uses a friction-drive mechanism mounted near the bicycle’s seat post. A motor-powered roller presses against the rear tire and helps drive the wheel as the rider pedals.
This approach makes the system different from traditional conversion kits that require wheel replacements or drivetrain modifications.
How the ASUS Oxiis E250G1 Works
The Oxiis E250G1 uses a motor to provide electric assistance through the rear tire. The motor has a rated output of 250W and can reach up to 500W of peak power.
Riders can choose between three assistance modes based on their riding needs. Eco mode focuses on extending battery life during rides. Normal mode offers a balance between assistance and battery consumption.
Meanwhile, Sport mode provides stronger assistance for hills and situations requiring more power. Riders can change the modes using the booster itself or the ASUS Oxiis app. The app is available for Android and iOS devices.
Compatible With Several Bicycle Types
The ASUS Oxiis E250G1 supports several common bicycle designs. It works with city, road, gravel and folding bicycles. The system can also work with hybrid and hardtail mountain bikes. However, ASUS does not recommend installing it on full-suspension bicycles. It also should not be installed on bicycles with carbon-fiber seat posts.
In addition, heavily knobby tires are not recommended for the system. The booster supports wheel sizes from 16 to 29 inches, along with 700C wheels. It can accommodate tires up to 60mm wide. The supported seat-post diameter ranges from 25.4mm to 34.9mm.
Three Assistance Modes for Different Rides
The three riding modes give users greater control over electric assistance. Eco mode prioritizes battery efficiency and can provide the longest claimed range.
Normal mode offers a more balanced experience for everyday cycling. Sport mode delivers stronger assistance when riders need additional support.
The system also features ASUS Adaptive Boost Technology. This technology adjusts the assistance when the bicycle encounters slopes.
Furthermore, an anti-slip mechanism maintains pressure between the powered roller and tire. This helps improve power transfer while the bicycle is moving.
Battery Offers Up to 50KM of Claimed Range
The Oxiis E250G1 uses a removable 158.4Wh, 36V battery. ASUS claims the system can provide around 50KM of assistance in Eco mode. However, range can drop significantly when riders use stronger assistance.
Heavy use in Sport mode can reduce the claimed range to around 10KM. Actual performance will depend on several factors. These include terrain, rider effort and the selected assistance level.
Therefore, the claimed range should not be treated as a fixed distance for every rider. The removable battery supports 100W USB-C Power Delivery charging. A full charge takes approximately two hours.
Compact Design Keeps the System Portable
The complete Oxiis E250G1 system weighs 3.7KG, including its battery. It measures 400 × 84 × 128mm. Its compact design allows riders to add electric assistance without replacing major bicycle components.
The system therefore focuses on upgrading an existing bicycle rather than replacing it with a dedicated e-bike. This could make the approach useful for riders who already own compatible bicycles.
Smart Rear Light Adds Another Safety Feature
ASUS has also integrated a smart rear light into the booster. The light can detect when the rider slows down. It can then illuminate automatically as a brake light.
The system also offers a maximum electric-assisted speed of 32KM/h. However, ASUS limits the assisted speed to 25KM/h in regions where local regulations require that limit. This means the actual assisted speed can vary depending on local requirements.
Water Resistance Supports Everyday Conditions
The Oxiis E250G1 carries an IPX4 water-resistance rating. This rating means the system can withstand splashes and light rain. However, it should not be submerged in water.
ASUS also advises against using the system in heavy rain. Therefore, riders should consider weather conditions when using the booster.
ASUS Has Yet to Reveal Price and Release Details
Despite introducing the Oxiis E250G1, ASUS has not announced its price. The company has also not confirmed an exact release date. Markets where the system will initially become available have not yet been announced.
For now, the Oxiis E250G1 stands out as a compact bicycle conversion system. It combines a friction-drive motor, removable battery and app-based controls. Moreover, it avoids the wheel and drivetrain changes required by many traditional conversion kits.
With its claimed 50KM Eco range and 500W peak output, the booster offers a different approach to electric cycling.
However, riders will need to wait for pricing, availability and market-specific details before deciding whether it suits their bicycles.
