Freesky Alaska Pro M-520 Electric Bike | 4500W Peak Motor

The FREESKY Alaska Pro M-520 is a high-power electric bike designed for outdoor recreation and private-land use. It combines a 4500W peak brushless rear hub motor with a 48V 45Ah dual-battery system, delivering strong torque, extended range, and capable performance across demanding terrain.

The M-520 features dual removable batteries with a combined capacity of 45Ah, a cadence sensor, thumb throttle and five levels of pedal assist. Its 26-inch x 4-inch fat tyres, 120mm oil-sprung front fork, and 150mm rear air shock provide added support and control on gravel, sand, trails, and other uneven surfaces.

For stopping performance, the bike features 180mm four-piston hydraulic disc brakes at the front and rear. A Shimano 7-speed rear derailleur provides multiple gearing options, while the colour LCD shows key information such as speed, battery level, mileage, and pedal-assist level.

Key Features

• 4500W Peak Brushless Motor: High-output rear hub motor with up to 170 N·m of torque.
• 48V 45Ah Dual Battery: Two removable batteries with 18Ah and 27Ah capacities for a combined 45Ah system.
• Extended Claimed Range: Manufacturer-listed range of approximately 98–175 miles, depending on riding conditions and assistance level.
• 26 × 4-Inch Fat Tyres: Wide tyres designed to provide traction and stability across varied outdoor surfaces.
• Full Suspension: 120mm oil-sprung front fork combined with a 150mm rear air shock.
• Four-Piston Hydraulic Brakes: 180mm hydraulic disc brakes on the front and rear.
• Shimano 7-Speed Drivetrain: Multiple gear ratios for different terrain and riding conditions.
• Five-Level Pedal Assist: Adjustable pedal-assistance levels from 0–5.
• Thumb Throttle: Convenient throttle control integrated into the handlebar.
• Colour LCD Display: Shows speed, battery status, mileage, lighting status, and pedal-assist information.
• 400 lb Load Capacity: Manufacturer-listed maximum load capacity of approximately 181 kg.
• 6061 Aluminium Frame: Robust frame construction designed for demanding outdoor use.

Technical Specifications

Why Choose This Product

• High-output performance: The 4500W peak motor and 170 N·m torque provide substantial power for demanding private-land and recreational applications.
• Large dual-battery system: The combined 48V 45Ah battery configuration provides substantial stored energy for extended recreational sessions.
• Enhanced suspension: The front fork and rear air shock help absorb impacts across uneven surfaces.
• Strong braking system: Four-piston hydraulic disc brakes with 180mm rotors provide powerful braking performance.
• Fat-tyre traction: The 26 × 4-inch tyres provide a wide contact patch for varied outdoor surfaces.
• Practical control system: Five pedal-assist levels, a thumb throttle, and a colour LCD display provide straightforward control and monitoring.
• High load capacity: The manufacturer lists a maximum load of 400 lb, providing substantial capacity for the rider and permitted equipment.

FAQ

Is the FREESKY Alaska Pro M-520 EAPC compliant in the UK?
No. The manufacturer lists a 4500W peak motor, which is substantially above the 250W maximum continuous rated motor power permitted for a UK EAPC. This product should therefore not be advertised as a UK EAPC-compliant bicycle.

Can this electric bike be used on public roads in the UK?
The specifications supplied by the manufacturer do not support classification as a standard UK EAPC. The product should be restricted to suitable private land or other locations where its use is legally permitted. Customers should check applicable local requirements before use.

What battery does the Alaska Pro M-520 use?
It uses a 48V 45Ah dual-battery configuration consisting of an 18Ah battery and a 27Ah battery, according to the manufacturer.

What is the claimed range?
FREESKY lists a claimed range of approximately 98–175 miles. Actual range varies according to rider weight, terrain, temperature, speed, assistance level, tyre pressure, and other operating conditions.

What is the maximum load?
The manufacturer lists a maximum load capacity of 400 lb, approximately 181 kg.

Does it have suspension?
Yes. The Alaska Pro M-520 has a 120mm oil-sprung front fork and a 150mm rear air shock.

What type of brakes does it use?
The bike uses 180mm four-piston hydraulic disc brakes on both the front and rear.

Does it have pedal assist and a throttle?
Yes. The manufacturer lists five levels of pedal assist and a thumb throttle.

Off-Road Compliance Notice

Important UK Use Notice: The FREESKY Alaska Pro M-520 is listed by the manufacturer with a 4500W peak motor and performance specifications substantially above the limits for a standard UK EAPC. It is therefore not presented as EAPC compliant or road legal in the UK. This product is intended for suitable private-land, recreational or other legally permitted use only. Customers are responsible for confirming local laws, permissions, registration, licensing, insurance and other requirements before operating the product.