HKM-0775379 16 Inch Fat Tire E-Bike Runs a 750W Hub With 60 Nm on 16 x 4.0 Tires and a 48V 15Ah Pack With 7 Speeds

750W · 720Wh · 50 mi PAS · 16 x 4.0 · cable discs · Shimano 7-speed · 6-layer suspension · 49.6 lb · 264 lb load

Sixteen Inch Tires and a Sixty Pound Build That Fits a CarSmall Frame and Larger Weekends

A compact 48V fat bike with a 750W hub, 60 Nm of torque and a 15Ah pack worth 720Wh that lifts out of the frame with a key. Sixteen-inch 4.0 tires on spoked rims, twin front fork legs and twin rear coil shocks, cable disc brakes at both ends and a Shimano 7-speed drivetrain. It weighs 49.6 lb, carries 264 lb, sits at 27.56 inches and is sized from 5 ft 1 in, which makes it the rare fat bike that fits a short rider and the back of a hatchback.

The whole design answers one question: what does a fat bike look like for somebody who is not six feet tall? The answer here is a 16-inch wheel, a 27.56 inch seat height and a 56.69 inch overall length, which puts both feet down at a stop without sliding off the nose of the bench. The bars sit at 40.15 inches, high enough that you ride upright, and the wheelbase is 38.18 inches, short enough to turn in a driveway.

It is also light for the class. At 49.6 lb it is roughly twenty pounds under a full-size fat e-bike, which is what makes it practical as a second bike, a camper bike or a first e-bike for a teenager. The frame carries a rear rack, the front carries a round LED headlamp with a lit ring, and the whole thing is finished in matte black with orange accents on the hubs and the shock springs.

At a Glance

• 750W Rear Hub — 48V, 60 Nm of torque
• 48V 15Ah Pack — 720Wh, removable with a key
• 50 Miles — Pedal assist range
• 22 mph Top Speed — 35 km/h, listed
• Shimano 7-Speed — Trigger shifter at the right grip
• Cable Disc Brakes — Front and rear, mechanical
• Twin Front Forks — Two legs, plus two rear coil shocks
• 16 x 4.0 Tires — All-terrain knobby casing
• 49.6 lb — About 20 lb under a full-size fat bike
• 264 lb Load — Rated carry weight
• 27.56 in Seat Height — Sized from 5 ft 1 in
• Rear Rack — Flat deck behind the bench

Small Frame and Sixteen Inch Wheels

The frame is a compact moped shape in matte black, with a bench over the rear wheel and the battery box set into the frame between your knees. The geometry is the point: a 27.56 inch seat height, a 38.18 inch wheelbase and a 56.69 inch overall length, so it fits in the back of a hatchback and turns inside a driveway where a 26-inch fat bike needs three points.

The wheels are 16 x 4.0 knobbys on spoked rims with orange hubs, which is the smallest fat tire that still floats on sand and snow. Small wheels make the steering quicker and the bike easier to pick up, and the trade is that a pothole arrives sooner than it would on a 20-inch wheel, so you ride the surface rather than over it. Spokes can be trued at home, which matters at this weight.

Suspension runs to six contact points: two fork legs up front, two coil shocks at the rear and the two tires themselves. On a bike this light that is enough to take the rattle out of a gravel track without turning the ride to mush, and the rear springs are exposed, so you can see what is bottoming out. The brakes are mechanical cable discs rather than hydraulic, front and rear, with 160 mm rotors.

• Frame: compact moped shape, matte black
• Battery: 48V 15Ah, key-locked, removable
• Wheels: 16 in spoked, orange hubs
• Fork: twin legs, coil sprung
• Rear: twin coil shocks
• Brakes: mechanical cable disc, 160 mm

Fitted as shipped: a round LED headlamp with a lit ring, a rear rack behind the bench, a kickstand, front and rear fenders and the LCD dash. The bars carry the throttle, the assist switch and the brake levers, and the pedals are folding platforms so the bike packs down flat against a wall.

750W Hub and the 720Wh Pack

The motor is a 48V 750W brushless hub with 60 Nm of torque, which on a 16-inch wheel puts more force into the ground than the same motor would on a 20. The listed top speed is 35 km/h, about 22 mph, and that is the sensible ceiling for a bike with this wheelbase. A Shimano 7-speed derailleur gives you a gear to push against when the battery is low, which is more than most bikes at this size offer.

The pack is 48V 15Ah, 720Wh, key-locked in the frame and removable, so it charges indoors rather than in a cold garage. The listed range is 50 miles in pedal assist, which assumes a light rider, flat ground and a low assist level; throttle-only riding, sand and hills cut that roughly in half. Charge it through the port on the frame, and take the pack out if the bike is going to sit for a month.

Two numbers to keep straight when you compare this with bigger bikes: 750W is the motor rating and 60 Nm is the torque, and torque is what you feel on a slope. A 750W hub with 60 Nm on a 50 lb bike climbs a steep driveway cleanly where a 500W motor on a 70 lb bike labours. It will not keep up with a 1500W moped-style build on a long grade, and it is not meant to.

Who It Fits and How It Rides

The bench sits at 27.56 inches and the bars at 40.15, which suits riders from 5 ft 1 in to about 6 ft 2 in. Below that the bike is steady at a stop because the seat is low; above it your knees come up toward the bars. The 264 lb load rating covers most adults with a backpack, and the rear rack takes a bag or a small carrier without upsetting the steering.

On gravel, packed dirt and snow it is stable and the twin rear springs keep the bench from kicking, and the fat casing means you can run low pressure and still roll. On pavement the knobbys hum above 15 mph and the small wheels make it feel busy, which is the honest trade for a bike that fits in a trunk. It is at its best on a campground loop, a beach path or a short commute rather than a long road ride.

• Campground loops and fire roads
• Beach paths and packed sand
• A second bike that fits in a car
• Not for long road rides or tall riders

What's in the Box

Before the first ride: fit the front wheel and torque the axle, unfold and check the pedals, set the rear spring preload for your weight, bed the cable discs in with ten firm stops from a walking start and charge the pack. Budget 30 to 45 minutes, most of it on the front wheel, and check the brake cables have not stretched after the first ten miles.

Color and Finish

Matte black covers the frame, fork legs, fenders, rack and bench, and the colour comes from three places: the orange hub shells, the red-orange coils on the rear shocks and the reflective amber strips on the pedals. It is a two-tone scheme that reads as a small motorcycle in photographs and stays understated in a hallway.

Touch-up paint in matte black is available on request. The wear points are the bench edges, the fork lowers where a lock or a curb will catch them and the rear rack where a bag straps rub.

Battery Care and Maintenance

Charge the pack between 20 and 90 percent for daily use and take it to full about once a month so the cells can balance. The pack comes out with a key, which makes the routine simple: carry it indoors, charge it on a bench at room temperature, refit it before the ride. Store it around half charge if the bike will stand for a month or more, and never charge it below freezing.

Check tire pressure before every ride, around 15 psi on pavement and 8 to 10 psi on sand, and check the spokes after the first 50 miles because a new wheel beds in. Cable discs need the barrel adjuster turned as the pads wear, so check the lever travel monthly; the pads themselves are a five-minute swap. Keep the chain clean so the seven gears shift, and wipe the fork legs after a wet ride.

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-0775379 · compact 16 inch fat tire electric bike · 48V 750W brushless rear hub, 60 Nm · 48V 15Ah 720Wh pack, key-locked and removable · 50 miles in pedal assist · 35 km/h top speed, about 22 mph · mechanical cable disc brakes front and rear on 160 mm rotors · twin fork legs and twin rear coil shocks over 16 x 4.0 knobby tires · Shimano 7-speed · 56.69 in long, 38.18 in wheelbase, 27.56 in seat height · 49.6 lb with a 264 lb load rating · sized from 5 ft 1 in · round LED headlamp, flat rear rack, front and rear fenders · matte black with orange hubs · charger in the box · UL listed · built for campground loops, beach paths and short commutes rather than long road rides