HKM-6051027 Fat Tire E-Bike Runs a 1500W Hub on 20 x 4.0 Tires With an 864Wh Pack and Seven Speeds for Heavy Riders

1500W · 864Wh · 20 x 4.0 · 136.7 lb · 7-speed · full suspension · mechanical discs · 330 lb load

Twenty Inch Fat Tires and a Bench That Swallows Every BumpA Red Frame and Quiet City Streets

A 20-inch fat bike built around a steel frame in gloss red or blue, with a 1500W hub, a 48V 18Ah pack worth 864Wh and Shimano seven-speed gears. A sprung fork over twin rear coil shocks, mechanical discs at both ends, a long bench and a black panel in the frame triangle. It weighs 136.7 lb, carries 330 lb, and it is listed at 20 to 37 miles. The 864Wh pack sits behind the side panel, so it charges where the bike is parked rather than coming indoors.

The silhouette is a small motorcycle: a tubular frame in gloss red or blue, a bench that runs over the rear wheel, a round headlamp on a bracket and a black panel with a carbon weave filling the space where an engine would sit. Behind the bench there is a number plate holder, and the fork is a straight-leg unit with a fender.

It is the heaviest bike in this group at 136.7 lb, and that is the number to take seriously: it is not going on a roof rack and it is not going up a flight of stairs. What you get for the weight is a 330 lb rating and a frame that does not flex under a heavy rider at speed.

At a Glance

• 1500W Rear Hub — 48V system, single motor
• 48V 18Ah Pack — 864Wh behind the frame panel
• 20 to 37 Miles — Listed range
• Shimano 7-Speed — Trigger shifter at the right grip
• Full Suspension — Sprung fork and twin rear coils
• Mechanical Discs — Front and rear
• 20 x 4.0 Tires — Knobby casing on spoked rims
• 136.7 lb — The heaviest build in this group
• 330 lb Load — Rated carry weight
• Long Bench — Moped length, fixed
• Red or Blue — Gloss frame over black parts
• Number Plate — Mounted behind the bench

Red Frame and a Long Bench

The frame is a tubular loop in gloss red or gloss blue, with a bench that runs from the seat tube back over the rear wheel and a number plate holder hanging behind it. A black panel with a carbon weave fills the triangle, and the round headlamp sits on a bracket above the front fender.

The wheels are 20 x 4.0 knobbys on spoked rims with black hubs. Spokes can be trued with a key, and the wide casing is what carries a 136.7 lb bike over sand without digging in. Run them at 15 psi on pavement and 8 on soft ground.

Suspension is a sprung fork up front and twin coil shocks at the rear, both visible and both adjustable at the collar. Brakes are mechanical cable discs at both ends, and the drivetrain is a Shimano seven-speed derailleur with a trigger shifter, which is what lets a rider pedal with the motor on a grade.

• Frame: tubular loop, gloss red or blue
• Battery: 48V 18Ah behind the panel
• Wheels: 20 in spoked, 4.0 knobby
• Fork: sprung, straight leg
• Rear: twin coil shocks
• Brakes: mechanical cable disc

Fitted as shipped: the round headlamp, front and rear fenders, the number plate holder, a kickstand and the pedals. The bars carry the throttle, the assist switch, the brake levers and a small display, and the frame panel hides the controller and the wiring.

1500W and 864Wh

The motor is a 48V 1500W rear hub, and on a 136.7 lb bike it has real work to do: it pulls the machine away from a stop and holds speed on a grade without straining. The Shimano seven-speed derailleur behind it gives you a gear to push against when the battery is low.

The pack is 48V 18Ah, 864Wh, and it sits behind the carbon-weave panel in the frame triangle. The listed range is 20 to 37 miles, which is the honest spread for a motor this size on a bike this heavy: 37 is low assist on flat ground, 20 is throttle and hills.

Weight is the trade here. A 136.7 lb bike with a 1500W hub and an 864Wh pack is stable and planted at speed, and it will not be pushed home easily if the battery runs out. Plan rides by distance rather than by how you feel, and charge it where it is parked.

Who It Fits and How It Rides

The bench is long and low and the bars are high, so it suits riders from about 5 ft 5 in to 6 ft 3 in. The 330 lb rating covers a heavy adult with a pack, and the frame does not flex under that load. At 136.7 lb it is a two-person lift onto a truck bed, which is the main practical limit.

On gravel and packed dirt it tracks straight and the twin coils keep the bench level, and the fat casing floats over sand. On pavement it is heavy and slow to steer, and the knobbys hum above 15 mph. It is a trailhead and campground bike, not a commuter, and it needs a truck or a ramp rather than a rack.

• Fire roads and gravel tracks
• Campgrounds and private ground
• A heavy rider who needs the 330 lb rating
• Not for stairs a roof rack or a bike lane

What's in the Box

Before the first ride: fit the front wheel and torque the axle, set the bars square to the fork, set the rear spring preload for your weight, bed the cable discs in with ten firm stops and charge the pack. Budget 40 to 60 minutes, most of it on the front wheel, and check every fastener after the first hour.

Color and Finish

Two frame colours, gloss red and gloss blue, both over black fenders, fork, bars, rims and bench. The side panel is black with a carbon weave and the only bright metal is the brake rotors and the shock springs, which are anodized red.

Touch-up paint is available in both frame colours. The wear points are the panel edges where a knee rubs them, the number plate holder and the fork lowers.

Battery Care and Maintenance

Charge between 20 and 90 percent for everyday use and take it to full about once a month. The pack sits behind the frame panel rather than lifting out, so charge it where the bike is parked and keep that spot above freezing. Store it around half charge if the bike will sit for a month.

Check tire pressure before every ride at 15 psi on pavement and 8 on soft ground, and check the spokes and axle nuts after the first 50 miles. The cable discs need the barrel adjuster turned as the pads wear, and the pads are a five-minute swap. Keep the chain oiled so the seven gears shift, and check the shock preload if the rider changes.

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-6051027 · fat tire electric bike · 48V 1500W rear hub with a Shimano 7-speed drivetrain · 48V 18Ah 864Wh pack behind a carbon-weave frame panel · 20 to 37 miles listed range · mechanical cable disc brakes front and rear · sprung fork with twin coil shocks at the rear · 20 x 4.0 knobby tires on spoked rims · tubular frame in gloss red or gloss blue with a long bench and a number plate holder · 136.7 lb with a 330 lb load rating · sized 5 ft 5 in to 6 ft 3 in · charger in the box · UL listed · built for fire roads, gravel and campgrounds rather than commuting · a steel frame rated to 330 lb so a heavy rider is not the limit · 136.7 lb means a ramp rather than a roof rack · seven speeds so the motor is not alone on a climb