HKM-1529043 Retro Dual Hub Fat Tire E-Bike Drives Both 20 x 4.5 Wheels with Twin 2000W Motors and a 1248Wh Tank and Sprung Bench

2000W · 1248Wh · 34 mph · 20 x 4.5 · dual hubs · full suspension · disc brakes · 7-speed · 331 lb load

A Tank Full of Battery and Both Wheels Doing the Hard WorkTwo Motors and a Longer Beach Day

A retro tank-style fat bike with two 2000W hub motors, one in each wheel, and a 48V 26Ah pack worth 1248Wh where the fuel tank would be. Twenty-inch 4.5 knobbys, full suspension, disc brakes at both ends, a seven-speed drivetrain and a bench seat over the rear wheel. It is listed at 34 mph with a 331 lb load rating, and it is the two-motor version rather than a single hub pretending to be one. The tank carries the battery.

The shape is a motorcycle silhouette rather than a bicycle one: a teardrop tank between the bars and the seat, a bench that floats over the rear wheel on a pair of springs, a crate-style panel filling the frame triangle and a round headlamp on the fork crown. It comes in blue and in yellow, both over a black frame, and the tank is the only painted part of the bike. The design reads well in person.

Two motors change how it rides. Power goes to the front wheel as well as the rear, which is what pulls a bike this heavy through sand and up a loose slope without the rear spinning. It also means two controllers and two cables to check, and it is the reason the battery is 26Ah rather than the 15 or 20Ah a single motor would need.

At a Glance

• Dual 2000W Hubs — One motor in each wheel
• 48V 26Ah Pack — 1248Wh in the tank
• 34 mph Top Speed — Listed figure
• 37 Miles — Listed range
• 20 x 4.5 Tires — Wider casing than a 4.0
• Full Suspension — Fork up front, twin springs rear
• Disc Brakes — Front and rear
• 7-Speed Drivetrain — Derailleur at the rear wheel
• 331 lb Load — 150 kg rating
• Retro Tank — Painted tank over a black frame
• Bench Seat — Sprung, over the rear wheel
• Two Colours — Blue or yellow over black

Retro Tank and Four Point Five Tires

The frame is black with a teardrop tank bolted between the bars and the seat, a bench that sits on two exposed springs over the rear wheel and a panel in the frame triangle that carries the controller and the wiring.

The wheels are 20 x 4.5 knobbys, half an inch wider than the 4.0 casing most fat bikes use, on spoked rims. The extra width is what makes a bike this heavy float in sand instead of digging in, and it is also why the steering feels slower than a 4.0 bike at low speed.

Suspension is a telescopic fork up front and a pair of coil springs under the bench at the rear, which is a simpler arrangement than a linkage and easier to live with: you can see the springs, you can change the preload with a spanner, and there is nothing hidden to seize.

• Frame: black, retro tank over the top tube
• Motors: two 2000W hubs, front and rear
• Battery: 48V 26Ah, in the tank
• Wheels: 20 in spoked, 4.5 knobby
• Rear: twin coil springs under the bench
• Brakes: disc, front and rear

Fitted as shipped: the round headlamp, front and rear fenders, the sprung bench, a kickstand and the pedals. The bars carry the throttle, the assist switch and the brake levers, and the frame panel carries the charge port and the controller where air can reach it.

Two Hubs and 1248Wh

Each wheel has its own 2000W hub motor, so the bike is effectively all-wheel drive. That is not a marketing line: on loose ground the front motor pulls while the rear pushes, and the bike tracks straight where a rear-drive fat bike would step out. The trade is weight and complexity, and two controllers to keep dry.

The pack is 48V 26Ah, 1248Wh, and it is the largest battery in this group by some margin. It lives in the tank, which keeps it high but central, and the listed range is 37 miles. That figure assumes mixed assist; running both motors hard on sand will cut it, and the practical number to plan a ride around is 25 to 30.

Top speed is listed at 34 mph, which is a both-motors figure on flat ground. The load rating is 331 lb, or 150 kg, and that matters here: a dual-motor bike with a 26Ah pack is heavy before you put a rider on it, so the rating is part of the specification rather than a footnote. Acceleration is smooth from a standstill.

Who It Fits and How It Rides

The bench sits low and long, and the bars are high, so it suits riders from about 5 ft 5 in to 6 ft 3 in. The step-over height is the thing to check, because the tank sits where your knee wants to go when you mount.

On sand and loose gravel the dual motors are the difference between riding and pushing, and the 4.5 casing floats. On pavement it is a heavy, slow-steering bike that hums, and 34 mph on knobbys is more than you want in traffic.

• Sand, gravel and fire roads
• Beach and campground riding
• Two-up at low speed on private ground
• Not for traffic, stairs or a roof rack

What's in the Box

Before the first ride: fit the front wheel and torque the axle, check both motor cables are seated, set the rear spring preload for your weight, bed the disc brakes in with ten firm stops and charge the pack. Budget 45 to 70 minutes, and check the spokes and both axles after the first ten miles.

Color and Finish

Two colourways, both over a satin black frame: a deep blue tank and a bright yellow one, with black fenders, bench and rims in either case. The tank is the only gloss surface on the bike, and the crate-style panel in the frame triangle is left bare so the controller and wiring are visible.

Touch-up paint is available for both tank colours. The wear points are the tank edges where a knee rubs, the bench cover and the frame panel where a boot scuffs it.

Battery Care and Maintenance

Charge between 20 and 90 percent for everyday use and take it to full about once a month. A 1248Wh pack is a big battery: expect a long charge, and plug it in when you get back rather than the morning you ride. Keep the charge port dry and the bike above freezing while charging, and store it around half charge if it will sit for a month.

Two motors mean two sets of cables to check: look at the connectors at each hub after a wet ride and make sure the seals are seated. Check the spokes and both axle nuts after the first 50 miles, check the disc pads monthly, and keep the chain oiled so the seven gears shift. Wipe the fork stanchions so grit stays out of the seals.

Specifications

Frequently Asked Questions

Service and Policies

Coverage that lasts beyond the box. Orders ship free with a tracking number in 2 to 5 business days. From delivery, the product is protected for 180 days against manufacturing defects and transit damage, returnable within 30 days for a full refund, and covered by a 24-month parts-and-labor warranty on manufacturing defects. Four policies, one idea: ship it free, protect it for 180 days, take it back for 30, and stand behind it for two years.

HKM-1529043 · dual motor retro fat tire electric bike · two 2000W hubs, one in each wheel · 48V 26Ah 1248Wh pack in the tank · 37 miles listed range · 34 mph top speed · disc brakes front and rear · telescopic fork with twin coil springs under the sprung bench · 20 x 4.5 knobby tires on spoked rims · 7-speed drivetrain · 331 lb load rating, 150 kg · retro painted tank in blue or yellow over a satin black frame · round headlamp, fenders and a frame-panel controller · sized 5 ft 5 in to 6 ft 3 in · charger in the box · UL listed · built for sand, gravel and fire roads rather than traffic · two controllers, two cable runs and two hub connectors to check after a wet ride · charger in the box