HKM-4052179 Cafe Racer E-Bike Runs a 1000W Hub on Cast 20 x 4.0 Wheels With a 48V 15Ah 720Wh Pack for the Trail

1000W · 48V 15Ah 720Wh · 20 x 4.0 · 28 mph · cast wheels · cafe racer seat · 70 Nm

Cast Wheels Clip On Bars and a Seat Built for One Rider OnlyCafe Racer Lines With Quiet Thunder

A 1000W rear hub with 70 Nm, a 48V 15Ah 720Wh pack in a case on the frame, cast alloy 20 x 4.0 wheels instead of spoked ones, an inverted double-crown fork with twin coil shocks at the back and mechanical disc brakes. It is a cafe racer in shape rather than a mountain bike: round grille headlight, brown bench seat, listed at 22 to 28 miles and 28 mph. The cast wheels are why it asks for so little maintenance, and the brown bench is why it does not look like every other fat bike.

Cast wheels are the detail that sets this bike apart, and they are a real trade rather than a styling flourish. One-piece alloy wheels need no spoke tension checks, they do not go out of true on a pothole, and they hold a tubeless-style bead far more reliably than a spoked rim. What you give up is field repair: bend a cast wheel and it is a replacement, where a spoked rim can usually be trued at a shop.

The rest of the bike follows that theme. A round grille headlight, a brown bench seat rather than a saddle on a post, and a frame spine that runs almost straight from the head tube to the rear axle. It is a look that reads best in black, and it is why this one photographs like a small motorcycle rather than a fat-tire bicycle.

At a Glance

• 1000W Rear Hub — 70 Nm quoted, single motor
• 720Wh Pack — 48V 15Ah in a case on the frame
• 22 to 28 Miles — Listed range, mode dependent
• Cast Alloy Wheels — 20 x 4.0, no spokes to true
• Full Suspension — Inverted fork, twin rear coil shocks
• Mechanical Discs — Front and rear, cable actuated
• Cafe Racer Bench — Brown seat, two-up length
• Round Grille Light — Retro lamp at the front
• 7-Speed — Geared to pedal a flat pack home
• 28 mph Listed — Above the Class 3 line in most states
• Black Frame — With a brown seat and black rims
• Front Rack — Hoop over the front wheel

Cast Wheels and a Cafe Racer Frame

The frame is a black steel spine with a long top run from the head tube to the seat, and the battery case clamped underneath it. It is the shape a small cafe racer has rather than a mountain bike, and the brown bench on top of it is what makes that read at a distance.

The wheels are the part worth explaining. Cast alloy in one piece means there is no spoke tension to check and a bead seat that holds pressure better than a spoked rim at low fat-tire pressures. The trade is that a bent cast wheel cannot be trued, only replaced.

Suspension is at both ends: an inverted double-crown fork up front and a pair of coil shocks under the rear. On four-inch tires that is enough travel to keep the bike settled on gravel, and it separates this from a rigid-frame fat bike at the same price.

• Frame: steel spine, black
• Battery: 720Wh case on the frame
• Wheels: cast alloy, no spokes
• Fork: inverted, double crown
• Rear: twin coil shocks
• Brakes: mechanical disc, front and rear

Fitted as shipped: front and rear fenders, a front rack hoop, a round grille headlight, a kickstand and the battery keys. The levers are mechanical disc at both ends, cable actuated, which is the right call on a bike maintained at home.

1000W Hub and 720Wh of Pack

The motor is a 1000W brushless rear hub quoted at 70 Nm. On a cast 20-inch wheel that torque arrives with more force at the tire than the same motor would put down on a bigger wheel, which is why the bike pulls away from a stop cleanly and climbs a fire-road grade without the motor sounding strained. It is a single motor in the rear wheel, so the steering stays light and there is one controller to go wrong rather than two.

The pack is 48V 15Ah, 720Wh, in the case on the frame with a key lock and a sealed port. A full charge is an evening on the supplied charger rather than an overnight, and the case comes off for indoor charging, which is the practical part in a flat with no garage. It also means a replacement in a few years is a case rather than a frame, and the charge window is readable while the bike is parked.

Range is listed at 22 to 28 miles, and those numbers are conservative for a 720Wh pack: the low end assumes throttle-heavy riding on soft ground and the high end steady pedalling on a hard surface. Treat 22 as the working figure for a loaded day, 28 as the best case, and plan the loop so the return leg is downhill or downhill-wind.

Who It Fits and How It Rides

The bench is fixed rather than on a post, so the fit range is narrower than the frame suggests: about 5 ft 4 in to 6 ft 2 in. Taller riders will feel their knees come up, and shorter riders will find the step-in easier than a saddle bike, so sit on one before ordering.

On gravel and packed dirt it is stable and the twin shocks keep the bench level. On pavement the knobby tread hums and the mechanical discs want a full hand rather than two fingers, which is the honest cost of the simpler brake system.

• Fire roads, farm tracks and packed dirt
• Campgrounds and short backcountry trips
• Riders who want a retro look with real suspension
• Not for tight singletrack, stairs or commuting in rain

What's in the Box

Before the first ride: check both axles and the steering head, set the fork and shock preload for your weight, bed the mechanical pads in with ten firm stops, then charge the pack. Cast wheels have no spokes to check, so put that time into the brakes instead.

Color and Finish

Matte black covers the frame, fork lowers, fenders and rims, with a brown bench seat and a black cockpit. The brown on black is the whole colour scheme, and it is what gives the bike its retro read rather than the usual graphic-covered fat bike look.

Touch-up paint in matte black is available on request. The wear points are the bench edges, the cast wheel faces and the chainstay under the chain.

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 management system can balance the cells. A 720Wh case charges in an evening, so there is no reason to leave it at 100 percent in a warm hallway for weeks at a time.

Check tire pressure before every ride at 15 to 20 psi on pavement and 8 to 12 psi on dirt, and check both axles after the first 50 miles. Check the mechanical pads monthly and the cable tension at the lever, since cable discs settle in over the first hundred miles, and wipe the cast wheels 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-4052179 · cafe racer style fat tire e-bike · 1000W brushless rear hub with 70 Nm, listed · 48V 15Ah 720Wh pack in a case on the frame, key-locked and removable · 22 to 28 miles listed range · 28 mph listed · 7-speed drivetrain · mechanical disc brakes front and rear, cable actuated · inverted double-crown fork with twin rear coil shocks · cast alloy 20 x 4.0 wheels with no spokes to true · brown bench seat, two-up length · round grille headlight · front rack hoop · front and rear fenders · steel spine frame in matte black · UL listed · no spokes to tension · front rack hoop and fenders fitted · charger, keys and tools in the box · built for fire roads, trail riding and campgrounds rather than tight singletrack or stairs