HKM-1463507 Fat Tire E-Bike Runs a 48V Rear Hub With 85 Nm on 20 x 4.0 Tires With a 960Wh Pack and Hydraulic Discs

48V · 960Wh · 85 Nm · 20 x 4.0 · gold fork · hydraulic discs · 7-speed · full suspension · 960Wh pack

A Phone Charger on the Bars and a Pack for the Whole DayGold Forks and Honest Range Miles

A 20-inch fat bike with a 48V rear hub, 85 Nm of torque and a 48V 20Ah pack worth 960Wh in the down tube. A gold inverted fork over a rear coil shock, hydraulic discs at both ends, Shimano 7-speed gears and 20 x 4.0 knobbys on gold rims. It is listed at 31 to 37 miles with a 30 degree climb, the bars carry an LCD and a phone mount with a charging port, and the rear rack has perforated side plates for a bag.

The bike is black from the frame to the fenders, and the gold is what you see first: the fork lowers, the rim stripes and the coil on the rear shock. There is a perforated plate on each side of the rear triangle where a bag can be strapped, and the seat is a long bench rather than a saddle, so it reads as a small motorcycle in profile the way the moped-shaped bikes do.

Under the styling it is a straightforward fat bike: a steel frame, a rear hub motor, a downtube battery and a single-pivot rear end. That is not a criticism. It is the layout that keeps the price down and the service simple, and the parts that matter on loose ground, the fork, the shocks and the brakes, are the parts that got the money.

At a Glance

• 48V Rear Hub — 85 Nm of torque, 30 degree climb
• 48V 20Ah Pack — 960Wh in the down tube
• 31 to 37 Miles — Listed range
• Shimano 7-Speed — Trigger shifter at the right grip
• Hydraulic Discs — Front and rear, red calipers
• Gold Inverted Fork — Paired with a rear coil shock
• 20 x 4.0 Tires — Knobby casing on gold rims
• Three Ride Modes — Bike, assisted and throttle
• LCD Display — Speed, PAS and battery bar
• Phone Mount — With a charging port
• Bench Seat — Long, flat and padded
• Rear Rack — Perforated side plates for bags

Gold Fork and Fat Tires

The frame is a black diamond with a long bench over the rear wheel and a perforated plate in each side of the rear triangle. Up front the fork is inverted with gold lowers and black stanchions, and the rear is held by a coil shock that you can see through the frame. The bars sweep back, and a round headlamp with a cage-style guard sits on the crown.

The wheels are 20 x 4.0 knobbys on spoked rims with gold stripes, which is the size that gives you float in sand without the steering going vague. Spokes can be trued with a key, and the rims are wide enough to hold the casing square at low pressure. Run them at 15 psi on pavement and 8 on sand.

Brakes are hydraulic calipers with red bodies on both rotors, which is a step up from the cable discs most bikes at this price use: they need less lever effort and they do not fade on a long descent. The suspension is an inverted fork up front and a coil shock at the rear, so the bike takes a curb, a root and a pothole without passing any of it up your spine.

• Frame: steel diamond, black
• Motor: 48V rear hub, 85 Nm
• Battery: 48V 20Ah, down tube
• Wheels: 20 in spoked, gold rims
• Fork: inverted, gold lowers
• Brakes: hydraulic disc, red calipers

Fitted as shipped: the headlamp with its guard, front and rear fenders, a rear rack with perforated plates, a tail light, a kickstand and the pedals. The bars carry the throttle, the assist switch, the LCD and a phone mount with a charging port, which is the one accessory most riders end up buying separately.

960Wh and Three Ride Modes

The pack is 48V 20Ah, which works out at 960Wh, and it sits in the down tube where the weight is lowest and most central. The listed range is 31 to 37 miles, and that spread is honest: 37 is the light-rider flat-ground figure, 31 is what you get with a heavier rider or a route with climbs. Charge it through the port on the frame.

There are three ways to ride it. In bike mode the power is off and it is a heavy fat bike with seven gears. In assisted mode the motor adds to your pedalling without the throttle, which is where the range figures come from. In throttle mode you do not pedal at all, and the motor does everything, which is the mode that empties the pack fastest.

The hub makes 85 Nm, and the listed climb is 30 degrees. On a 20-inch wheel that torque is what gets you up a loose slope, and it is the number to compare rather than the wattage, which the listing does not quote consistently. The seven-speed Shimano drivetrain behind it means you can still pedal when the battery is low, which is the difference between riding home and walking home.

Who It Fits and How It Rides

The bench is fixed and the bars are high, so it suits riders from about 5 ft 5 in to 6 ft 3 in. The step-through gap above the battery helps at a stop, and the long seat means you can slide back for a climb. If you are shorter than 5 ft 5 in the reach to the bars will feel long, so sit on one before ordering.

On gravel, packed dirt and snow it is stable, the fat casing floats and the fork keeps the bars from kicking. On pavement it rolls smoothly and the knobbys hum above 15 mph, which is the usual trade. It is a heavy bike to lift onto a rack and a heavy bike to pedal with the power off, so treat bike mode as a way home rather than a way to ride.

• Gravel, fire roads and packed dirt
• Beach paths and snow
• Errands where a fat bike fits
• Not for singletrack or lifting onto a roof rack

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 shock preload for your weight, bed the hydraulic brakes in with ten firm stops and charge the pack. Budget 40 to 60 minutes, and check the axle nuts and the stem bolts again after the first ten miles.

Color and Finish

Black covers the frame, fenders, rack and bench, and the gold is in the fork lowers, the rim stripes and the rear spring. The brake calipers are anodized red, which is the only third colour on the bike. It is a scheme that photographs well and hides trail dust.

Touch-up paint in satin black is available on request. The wear points are the fork lowers, the rack plates where straps rub and the frame under the battery box.

Battery Care and Maintenance

Charge between 20 and 90 percent for everyday use and take it to full about once a month so the cells balance. The pack lives in the down tube 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 or more.

Check tire pressure before every ride at 15 psi on pavement and 8 on sand, and check the spokes and axle nuts after the first 50 miles. Hydraulic brakes need the pads checked monthly and the lever feel watched for sponginess, which means air in the line. Keep the chain oiled so the seven gears shift, and wipe the fork stanchions after a wet ride so grit does not get under 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-1463507 · fat tire electric bike · 48V rear hub with 85 Nm and a 30 degree climb · 48V 20Ah 960Wh pack in the down tube · 31 to 37 miles listed range · Shimano 7-speed drivetrain · hydraulic disc brakes front and rear with red calipers · inverted gold fork over a rear coil shock · 20 x 4.0 knobby tires on spoked gold rims · three ride modes, bike, assisted and throttle · LCD display and a phone mount with a charging port · long bench seat, rear rack and fenders · sized 5 ft 5 in to 6 ft 3 in · black with gold fork and rims · charger in the box · UL listed · built for gravel, fire roads, beach and snow rather than singletrack