HKM-8148179 Alloy Soft Tail Fat Tire E-Bike Carries 350 lb on 864Wh with Hydraulic Discs and 7 Speeds to 34 mph

1500W · 864Wh · 20 x 4.0 · 20-37 mi · key-locked pack · coil fork and twin rear shocks · mechanical discs · 7-speed

A Carbon Steel Frame with a Coil Fork and Shocks under the BenchSimple Hardware for Rough Ground

A 20-inch fat tire electric dirt bike built on a 1500W rear hub and a 48V 18Ah pack worth 864Wh, listed at 20 to 37 miles per charge with 20 mph on the throttle as it ships. A coil fork and twin coil shocks under the bench make it full suspension, mechanical discs slow both wheels, and a Shimano seven-speed with a thumb shifter handles the gears. The frame is welded carbon steel, the pack is key-locked and removable, and the LCD runs five assist levels plus a walk mode.

The case for this bike is what it does not ask of you. One motor, one controller, one pack, cable discs and a thumb shifter: there is no app to pair and no menu tree to learn. A rider can understand the whole machine after ten minutes with the manual, and every part of it is the sort of hardware a local shop already stocks. That matters on a farm track or a fire road at dusk, where a bike that is merely predictable beats a bike that is clever.

The honest trade is weight and brake hardware. At 136.7 lb it wants a ramp or a second pair of hands to load, and mechanical discs are the modest part of the build. They stop predictably in the dry and adjust with a barrel nut, though they are not hydraulic feel. Choose this bike for simple repairs and payload rather than lever finesse.

At a Glance

• 1500W Rear Hub — 48V brushless hub in the rear wheel
• 864Wh Pack — 48V 18Ah, key-locked and removable
• 20 to 37 Miles — Listed range per charge
• Full Suspension — Coil fork and twin rear shocks
• Mechanical Discs — Front and rear rotors
• 7-Speed Gearing — Shimano indexed, thumb shifter
• 20 x 4.0 Tires — Knobby casing on spoked wheels
• Carbon Steel Frame — Welded step-over loop
• LCD Display — Five assist levels and walk mode
• 330 lb Payload — 150 kg rated, conservative
• Four Colors — Red, yellow, black and blue
• 136.7 lb Net — 62 kg before the rider

What Stays Simple and Why It Helps

Simplicity here is structural. The battery sits in a key-locked case on the down tube with one charge port and one lock, the controller is a single box under the vented cover, and the wiring ends at a bar-mounted LCD. Nothing needs a firmware update to keep working.

That matters in the field. When something goes wrong on a ranch road, a bike with cable discs, a chain and a thumb shifter goes right with the hex keys in the box and parts a town shop already carries. There is no dealer tool and no firmware flash to wait on.

The carbon steel frame carries the same logic. It is a welded step-over loop, heavy on purpose, braced at the rear triangle where the twin coil shocks mount. Steel tolerates the pull of a 1500W hub without going brittle, and it welds cleanly if a tab ever cracks.

• Frame: welded carbon steel step-over
• Pack: 48V 18Ah, 864Wh, key-locked
• Motor: 1500W brushless rear hub
• Fork: coil with preload
• Rear: twin coil shocks under the bench
• Brakes: mechanical disc, both wheels

Fitted as shipped: the round LED headlight, a rear light, front and rear fenders, the bench saddle, a kickstand and platform pedals. The bars carry the throttle, the assist switch, the brake levers and the display.

1500W and 864Wh

The motor is a 1500W brushless hub in the rear wheel, which is the right size for a bike that weighs 136.7 lb before the rider. It pulls strongly from a standstill on gravel and holds speed up a long grade without the surge of an oversized controller, and the seven-speed cassette means the rider can pedal the bike home if the pack ever runs flat. The hub is sealed against water and the cable runs inside the chainstay, so a wet farm track does not faze it.

The pack is 48V 18Ah, worth 864Wh, in a key-locked case that lifts out for indoor charging. The listed range is 20 to 37 miles per charge: the wide end assumes pedal assist on firm ground and a light throttle hand, while throttle-only riding on soft dirt lands near the bottom. Charging from empty takes five to six hours on the included US-plug charger, so the routine is an overnight top-up rather than a lunch stop.

Five assist levels and a walk mode live on the LCD, so the bike can be tuned to a work loop rather than one fixed feel. Walk mode earns its keep at 136.7 lb when a gate or a slope needs the bike pushed rather than ridden, and the throttle is there for the moments when pedaling a heavy bike through soft ground would only spin the wheel.

Where It Fits and How It Rides

Twenty-inch 4.0 knobbies at low pressure carry the bike over gravel, roots and rutted farm track, and the coil fork plus twin rear shocks keep the bench level when the ground does not. On pavement the knobs hum and the steering slows down, which is the price of the tire rather than a fault.

What it is not: a light trail bike, a stair-climber or a roof-rack job. Riders from about 5 ft 4 in to 6 ft 3 in fit the bench, and the 330 lb rating covers a grown rider with tools or a dog in a crate behind the seat.

• Farm tracks and private lanes
• Fire roads and OHV areas
• Riders who value simple repairs
• Not for stairs or a roof rack

What's in the Box

Before the first ride: fit the pedals, set the bars square to the fork, torque both axles, set the fork preload for your weight, bed the mechanical discs in with ten firm stops and charge the pack to full. The bike arrives about 85 percent assembled, so budget an hour.

Color and Finish

Four finishes cover the same hardware: red, yellow, black and blue on the frame, with the fork, wheels, fenders and bench kept black. The battery cover is a vented dark panel in the frame centre, and the only bright metal is the brake rotors and the chain.

Wear shows first at the battery cover edges where a boot catches them, on the chainstay under the chain and at the fork stanchions. Touch-up paint ships on request.

Battery Care and Maintenance

The pack prefers living between 20 and 90 percent for daily use. Take it to full once a month to balance the cells, never charge it below freezing, and if the bike will sit for a few weeks leave the pack around half charge and top it up every month. Charge indoors on a hard surface away from flammables.

Before every ride, check tire pressure and squeeze both levers. Around 20 psi suits pavement and 8 to 12 psi suits soft ground. The mechanical pads wear faster than hydraulic ones on a 136.7 lb bike, so look at them every few rides and turn the barrel adjuster as the lever creeps in. Keep the chain oiled, check the axle nuts after the first 50 miles, and rinse the frame with a low-pressure hose.

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-8148179 · fat tire electric dirt bike · 1500W brushless rear hub · 48V 18Ah 864Wh key-locked removable pack · 20 to 37 miles listed range · 20 mph on throttle as configured · full suspension with a coil fork and twin coil shocks under the bench · mechanical disc brakes front and rear · Shimano 7-speed with a thumb shifter · 20 x 4.0 knobby tires on spoked wheels · welded carbon steel step-over frame · LCD with five assist levels and a walk mode · 330 lb payload · 136.7 lb net weight · five to six hour charge · round LED headlight and rear light · front and rear fenders · red yellow black and blue · 85 percent assembled · built for farm tracks and fire roads rather than a commute