FREESKY Alaska Pro M-520 Electric Bike – 48V 45Ah
The FREESKY Alaska Pro M-520 is a high-power fat-tyre electric bike for demanding off-road and private-land use. Its brushless rear hub motor delivers up to 4000W peak output and 160Nm torque.
The 48V 45Ah dual-battery system provides 2160Wh capacity, while 26 × 4.0-inch fat tyres, front and rear suspension, Shimano 7-speed gearing and 180mm four-piston hydraulic brakes support stable, controlled riding.
FREESKY Alaska Pro M-520 Electric Bike – 48V 45Ah Technical Specifications
| Model | FREESKY Alaska Pro M-520 |
|---|---|
| Product type | Fat-tyre electric bike |
| Motor | Brushless rear hub motor |
| Peak motor power | 4000W |
| Torque | 160Nm |
| Controller | 48V / 30A |
| Sensor | Speed sensor |
| Pedal assist | Levels 0–5 |
| Throttle | Thumb throttle |
| Battery | 48V 45Ah dual lithium battery system |
| Battery configuration | 18Ah upper battery + 27Ah lower battery |
| Estimated range | Approximately 158–282 km |
| Charging time | Approximately 6–8 hours |
| Charger | 3A smart charger |
| Transmission | Shimano 7-speed |
| Chain | KMC chain |
| Tyres | 26 × 4.0-inch fat tyres |
| Suspension | Front and rear suspension |
| Front fork | Lockable, adjustable hydraulic downhill fork |
| Brakes | Front and rear 180mm four-piston hydraulic brakes |
| Frame | Upgraded 6061 aluminium |
| Display | LCD colour display |
| Lighting | Front headlight |
| Kickstand | Adjustable heavy-duty aluminium kickstand |
| Seatpost | 30.9 × 350mm alloy |
| Bike weight | 40.8 kg |
| Maximum load | 181 kg / 400 lb |
| Total length | 194.3 cm |
| Wheelbase | 120.4 cm |
| Total height | 111.8 cm |
| Seat height | 80–103.4 cm |
| Seat tube angle | 73° |
| Reach | 45.7 cm |
| Standover height | 51.8 cm |
| Wheel diameter | 67.8 cm |
| Recommended rider height | 168–203 cm |
| Certification | UL2849 certified; battery tested to UL 2271 |
| Colour options | Black, blue and green |
| In the box | Electric bike, battery, charger, power cable, user manual, mudguards and rear rack |
Frequently Asked Questions
What motor is fitted to the Alaska Pro M-520?
It uses a brushless rear hub motor with up to 4000W peak output and 160Nm torque.
How is the dual battery configured?
The listed system combines an 18Ah upper battery and 27Ah lower battery for 48V 45Ah and 2160Wh total capacity.
What range is listed?
The estimated range is approximately 158–282 km. Actual range varies with load, assistance, terrain, temperature and riding style.
How long does charging take?
The listed charging time is approximately 6–8 hours with the supplied 3A smart charger.
What rider height does it suit?
The listed recommended rider-height range is 168–203 cm.
Delivery, returns and support
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FREESKY Alaska Pro M-520 Electric Bike – 48V 45Ah Product Images
