Freesky Alaska Pro M-520

The 2,160 Wh Single-Motor Fat-Tire — Built for Range, Not for Roads

The Alaska Pro M-520 is the longest-range single-motor fat-tire bike in our catalogue. One rear hub motor. 4,500W of peak power. A 48V 45Ah dual battery system that totals 2,160 Wh — 50% more energy than the dual-motor AWD Ranger Plus M-540, and roughly three times the capacity of the standard 720 Wh fat-tire benchmark. For riders who do not need all-wheel drive and would rather trade a second motor for a battery they cannot exhaust in a day, Freesky built exactly that.

The bike weighs 90 lbs — 16 lbs lighter than the dual-motor Ranger Plus despite carrying more battery. That is the trade Freesky made: skip the front hub motor and its associated harness, controller pair, and copper, and reinvest the weight budget into cells. The result is a bike with the practical range of a dual-battery hunting machine and the simpler mechanical layout of a conventional rear-drive eBike. One motor to service. One drivetrain to maintain. Two batteries that swap in and out for indoor winter storage or extended-day swaps.

The honest caveat: this is a step-over frame with a 28.7″ standover. You swing a leg over a top tube to mount. If hip mobility, knee flexibility, or balance at standstill is a concern, the step-thru Ranger Plus M-540 is the better choice — it costs more, weighs more, but you step through it. The Alaska Pro is for riders who want maximum range and power without the AWD complexity, and who can mount a traditional fat-tire frame.

Key Features

• 4,500W Peak Rear Hub Motor — 170 N·m Torque — Brushless rear hub paired with a 48V/30A controller. Acceleration is immediate from a stop; the 170 N·m peak delivers usable climb force on grades that bog smaller motors. Power delivery is throttle-direct — what you twist is what you get. Wattage guide →
• 48V 45Ah Dual Battery — 2,160 Wh Total — Both Removable — 18Ah pack + 27Ah pack, mounted in the frame, each independently removable for indoor charging. The largest stock battery configuration anywhere in our catalogue. Real-world range across Canadian conditions: 108–210 km summer depending on PAS and terrain; ~108 km mixed winter at −10°C after 25% cold-weather capacity loss. The dual-pack design means winter degradation does not strand you — one indoor-warmed pack will get you home even if the second is cold-soaked. Long-range guide →
• UL2849 Certified by TÜV — The complete eBike electrical system — controller, motor, wiring, BMS interaction — is independently tested and verified to UL2849 by TÜV. This is the system-level safety standard most eBikes in this category do not carry. UL2271 battery-level certification is not currently listed on Freesky’s published materials — we state only what we can verify.
• Full Suspension — 120 mm Oil-Sprung Fork + 150 mm Air Rear Shock — Freesky specifies a 120 mm oil-sprung front fork and a 150 mm air rear shock. The air shock handles trail chatter, drops, and the frost-heaved tarmac that defines Canadian spring. Combined with 4″ tires, the system stays composed at the bike’s 40 mph ceiling on rough surfaces where a hardtail would buck.
• 4-Piston Hydraulic Disc Brakes — 180 mm Rotors — Four pistons per caliper deliver substantially more clamping force than the two-piston units standard on most eBikes in this class. At 90 lbs of bike, 400 lbs of payload, and 40 mph top speed, four-piston brakes are the minimum responsible spec. Consistent feel in rain, mud, and packed snow — no cable stretch, minimal fade on long descents.
• 26″ × 4.0″ Fat Tires — Four inches of contact width floats over sand, snow, mud, and loose gravel. The 26″ wheel diameter rolls over obstacles more smoothly than smaller fat-tire setups and gives the Alaska Pro a stable ride height. Fat tire guide →
• Colour LCD Display — Shows speed, battery percentage for each pack, PAS level (0–5), trip mileage, odometer, and headlight status. Walk-assist mode (6 km/h) for pushing the bike alongside, cruise control on the throttle, and a USB output port for charging phones or accessories on long rides.
• Integrated 2,500-Lumen Headlight with Horn — Most eBike headlights run 200–400 lumens — enough to be seen, not enough to see by. The Alaska Pro’s 25W / 2,500-lumen unit throws a real cone of light for genuine after-dark riding on unlit roads or trails. The integrated horn replaces the standard bell — substantially louder, useful on shared paths where pedestrian alerts at speed matter.
• Shimano 7-Speed — KMC Chain — Seven mechanical gears layer on top of five PAS levels. Low gear for comfortable pedalling on climbs; high gear for efficient cruising. KMC chain is globally serviceable at any bike shop. The 7-speed is functional, not refined — honest take below.
• 400 lb Payload — IPX6 Weather Sealing — The electrical system is rated IPX6 for water-jet resistance, which means snow, rain, slush, and trail spray are not bike-killers. The 400 lb payload accommodates riders up to ~280 lbs with 120 lbs of cargo margin for panniers and gear. Heavy rider guide →
• Heavy-Duty Adjustable Aluminium Kickstand — A 90 lb bike on uneven ground needs a real kickstand. The Alaska Pro’s is rated for the full weight and length-adjustable for parking on slopes.
• Three Frame Colours — Black, Blue, and Green. All three use the same 6061 aluminium step-over frame.

Everything Included

Ships ~85% pre-assembled. Expect 30–45 minutes for final setup: front wheel, handlebars, pedals, seat post, battery installation. Two adults recommended for unboxing — the bike is 90 lbs in the carton.

• Freesky Alaska Pro M-520 eBike — Black, Blue, or Green
• 48V 18Ah lithium-ion battery pack — removable
• 48V 27Ah lithium-ion battery pack — removable
• 3A and 2A US-standard smart chargers — one per pack, so both batteries charge at once
• Colour LCD display with USB output (pre-installed)
• Integrated 2,500-lumen LED headlight with horn (pre-installed)
• Rear LED tail light (pre-installed)
• Heavy-duty adjustable aluminium kickstand (pre-installed)
• Pedals
• Battery keys — one set per pack
• Assembly tool kit
• Printed owner’s manual

Not included: Rack and fenders are not included with the Alaska Pro M-520 — if you need them for cargo carrying or wet-weather riding, budget for aftermarket fitment. This is a notable difference from the Ranger Plus M-540, which ships with both. Free Canada-wide shipping — Zeus coordinates delivery to your door.

Dimensions & Fit Guide

Fit notes: The 28.7″ standover means riders need at least a 28″ inseam to clear the top tube comfortably at a standstill. Riders at the bottom of the 5’6″ height range will be at the limit — consider sitting on the bike before committing if you are short-legged for your height. The 47.4″ wheelbase is long for a 26-inch-wheel bike; combined with the 90 lb mass and fat tires, this creates a planted, stable ride that resists crosswinds and absorbs road irregularities. The trade-off is manoeuvrability — tight U-turns require more room than a lighter, shorter-wheelbase bike. At 6’8″ the Alaska Pro is one of the very few fat-tire bikes in our catalogue that fits tall riders comfortably without a frame size upgrade.

The 90 lb / 2,160 Wh Reality — What This Bike Asks of You

90 lbs is heavy by general eBike standards but light for what this bike is. Most eBikes weigh 55–75 lbs. The Alaska Pro is 90. The Ranger Plus M-540 with similar peak power is 106. The 90 lb figure with 2,160 Wh of battery on board is the practical headline — Freesky kept the weight down by skipping the front motor, which translates to a bike that’s easier to lift, push, and load than its dual-motor counterpart.

That said, 90 lbs is still 90 lbs:

• Ground-level or garage storage is strongly recommended. Up a flight of stairs is a serious two-person job. The dual battery system helps here: pull both packs (combined ~7–8 kg / 15–18 lbs) and the bike drops to roughly 75 lbs — manageable for short single-person lifts.
• Vehicle loading should use a ramp. Lifting 90 lbs onto a truck bed or rear-mount rack without a ramp risks back injury and brake-lever damage. Bench-loading ramps are an inexpensive one-time purchase from any hardware retailer.
• Once you are riding, the weight disappears. 4,500W of peak rear-hub power moves 90 lbs like it is not there. The low centre of gravity (heavy frame + 26-inch fat tires) makes the bike feel planted and stable at speed, not top-heavy. In crosswinds, on gravel, over rough pavement — heavier bikes track straighter.

If weight matters more than range, single-motor step-thrus in our Step-Thru collection weigh 50–65 lbs and use smaller batteries. If you need the maximum traction insurance that AWD provides and can carry 16 more pounds, the Ranger Plus M-540 is the answer. The Alaska Pro is the right answer when range and power matter more than either of those.

The Honest Take — What We’d Change

Zeus sells this bike because 2,160 Wh of stock battery on a 90 lb frame at 4,500W peak does not exist anywhere else under our price ceiling. That does not mean it is perfect:

• Speed sensor, not torque sensor. The Alaska Pro uses a cadence-style speed sensor — it detects whether you are pedalling, not how hard. Assist is binary per PAS level: on when spinning, off when stopped. No proportional, natural-feeling pedal response. For throttle-dominant off-road riding this is functional. For pathway riding near pedestrians where precise speed control matters, the difference shows. The Eunorau Hunter X7 offers a genuine Bafang mid-drive torque sensor; the Velotric Nomad 2 has a SensorSwap system that toggles between torque and cadence on the fly. Torque vs cadence explained →
• UL2271 covers the 18Ah pack only. Freesky publishes UL2849 (system-level, TÜV) and UL2271 (battery-level, TÜV) for this bike — but the battery certificate it publishes is titled for the 18Ah pack, and there is no separate UL2271 certificate published for the 27Ah pack. If cell-level certification on every pack is a hard requirement for you — condo insurance, building bylaws, personal preference — ask us and we will get Freesky’s written confirmation before you buy.
• 7-speed Shimano is undergunned for a 4,500W machine. A bike with a 40 mph PAS ceiling and 170 N·m of torque deserves 8- or 9-speed gearing. The Eunorau Hunter X7 runs Shimano 9-speed. The Taubik Westridge 4T Off Road runs Shimano Acera 8-speed. Both are more appropriate for this power class. The 7-speed feels overgeared at low speed and undergeared at top speed — you ride on PAS and throttle, not the cassette, more than you should.
• Overnight charging, not an afternoon top-up. Freesky publishes 8–10 hours and ships two chargers — a 3A and a 2A — so both packs can go on at once rather than one after the other. On 2,160 Wh that is still an overnight job. Budget for an aftermarket faster charger if same-day multi-charge cycles matter to you. The Velotric Nomad 2 ships with a 3-hour fast charger from the factory at this price point — the Alaska Pro should match it.
• No included rack or fenders. At this battery size and the off-road positioning, an unpaved-day rider expects splash protection. The Ranger Plus M-540 includes both. The Velotric Nomad 2 includes fenders. Plan for an aftermarket rack and fender set, or buy from the Zeus accessories collection.
• No turn signals or NFC security. At 90 lbs and 40 mph, the Alaska Pro has the road presence of a moped. Turn signals are not included — aftermarket handlebar-mount signal kits are inexpensive and worth fitting. NFC anti-theft locking is not included either; rely on a heavy chain lock and indoor battery storage. The Velotric Nomad 2 has integrated turn signals and Apple Find My / Android Find Hub for tracking.
• Not a federally classified power-assisted bicycle in Canada. The Alaska Pro’s 4,500W peak and 40 mph PAS ceiling exceed Transport Canada’s 500W nominal / 32 km/h limits for a Power-Assisted Bicycle (PAB). This bike is sold for off-road trails, private property, motorised-vehicle-permitted routes, and Crown land where local rules allow. It is not for public roads, dedicated bike lanes, or multi-use pathways. Confirm local rules before riding off your own property.

Trade-offs acknowledged: a 90 lb single-motor fat-tire with 2,160 Wh of removable battery, full suspension, 4-piston brakes, and UL2849 system certification under the price tier of Velotric’s smaller-battery Nomad 2 is a genuine value proposition. The Alaska Pro is the right bike for the rider who has decided range, power, and battery flexibility matter more than AWD or integrated security tech.

Full Specifications

Shipping & Delivery

• Delivery: Ships within 3–7 business days from confirmation of order
• Shipping cost: Free Canada-wide shipping — no surcharges for the Yukon, Northwest Territories, or Nunavut
• Tracking: Tracking email is sent automatically once the bike leaves the warehouse
• Assembly: Ships ~85% pre-assembled — 30–45 minutes of final setup required (see assembly section above)
• Warranty: 1-month Zeus limited warranty plus 24-month Freesky manufacturer coverage on motor, battery, and controller (12 months on other parts). Optional Zeus extended support plans available at checkout