HKM-7754963 Off-Road E-Bike Runs a 1500W Peak Hub on 20 x 4.0 Kenda Tires with a 48V 18Ah 864Wh Pack for Fire Roads

1500W peak · 48V 18Ah 864Wh · 20 x 4.0 Kenda · five riding modes · 31 mph · 90 lb

Kenda Knobbys and a Peak Motor That Answers the ThrottleFive Ways to Meet the Same Old Trail

A 1500W peak rear hub, a 48V 18Ah 864Wh pack in the frame, 20 x 4.0 Kenda off-road tires, a suspension fork and disc brakes, with five riding modes on the bar. It is listed at 25 to 31 miles and 31 mph, and at 90 lb it is built like a small motorcycle rather than a bicycle: the Kenda tread and the peak power are the two things that define it, and the weight is the third: nothing about this bike is designed to be carried.

Twenty-inch fat tires on a 90 lb frame put this bike in a category of its own: it is short, wide and heavy, which makes it stable at speed and awkward to carry. The Kenda casing is a real off-road tire rather than a road tire with a pattern on it, and on gravel and packed dirt the difference is immediate. Riders who want a bike to lift onto a train or up a flight of stairs are looking at the wrong machine, and the sooner that is clear the happier they will be.

Peak power on a hub motor is a short-duration figure, and it is worth understanding before you buy: 1500W is what the motor can draw for a climb or a launch, while continuous power is lower. That is why the bike feels strong off the line and settles once you are at speed. Ask for continuous watts if you are comparing it with a mid drive.

At a Glance

• 1500W Peak Hub — Rear hub, short-duration peak output
• 864Wh Pack — 48V 18Ah in the frame, key-locked
• 25 to 31 Miles — Listed range, mode dependent
• 31 mph Listed — Above the Class 3 line in most states
• 20 x 4.0 Kenda — Off-road casing, not a road tire
• Five Riding Modes — Selected on the bar
• Suspension Fork — Coil sprung, rigid rear triangle
• Disc Brakes — Front and rear
• 90 lb Complete — 41 kg, a two-person lift
• Aluminium Frame — Step-over, battery in the frame
• LCD Display — Speed, battery, mode and trip
• Rear Rack — Frame mounted

Frame, Fork and Kenda Tires

The frame is aluminium and step-over, with the 864Wh pack inside the main triangle and a rear rack behind the seat. At 90 lb the bike is heavy for its size, and most of that weight is the battery, the motor and four inches of tire.

Up front there is a coil-sprung suspension fork and the rear is rigid. On 20 x 4.0 Kenda tires that works: the casing absorbs the small stuff, the fork takes the hits, and the short wheelbase keeps the bike manoeuvrable in tight ground.

The cockpit carries an LCD in the middle, a throttle on the right and the mode selector on the bar. Five modes is more than most bikes in this class offer, and it means you can pick a low-power setting for range rather than living with one throttle curve.

• Frame: aluminium, step-over
• Fork: coil-sprung suspension
• Rear: rigid triangle
• Brakes: disc, front and rear
• Tires: 20 x 4.0 Kenda off-road
• Modes: five, selected on the bar

Fitted as shipped: front and rear fenders, a rear rack, an LED headlight, a kickstand and the battery keys. The Kenda tread is the part that matters off pavement, and it is the first thing to replace when it wears if most of your riding is on dirt.

Motor, Battery and Range

The motor is a 1500W peak rear hub. Peak is a short-duration figure for a launch or a climb; the motor settles to a lower continuous output once you are at speed, which is why the bike feels strongest from a standstill and in the first few seconds of a hill. That is also why the first minute of a steep hill costs more battery than the next ten minutes of flat riding at the same speed.

The pack is 48V 18Ah, 864Wh, key-locked in the frame and removable for indoor charging. Charge time is listed at over three hours, and in practice a full charge from empty on the supplied charger takes four to five hours. The lock is on the frame, so the cover stays put when the pack comes out, and the charge port is sealed against a wet ride.

Range is listed at 25 to 31 miles, and both figures assume a rider who is not holding the throttle open. On 20-inch fat tires with a 90 lb bike, range falls quickly with speed, so the useful number for a mixed ride is nearer 25. The high figure assumes a light rider and a flat path, which is not what this bike is for.

Who It Fits and How It Rides

One frame size covers riders from about 5 ft 4 in to 6 ft 3 in. The 20-inch wheels keep the standover low, which suits shorter riders, and the width of the bars and tires makes the bike feel bigger than it is once you are moving.

On gravel, packed dirt and fire roads it is in its element: short, stable and hard to upset. On pavement the Kenda tread is loud and the bike is slower to steer than a commuter, and at 90 lb it is not something you carry up a flight of stairs.

• Fire roads, farm tracks and packed dirt
• Campgrounds, hunting trips and beach towns
• Short city hops where stability matters more than speed
• Not for tight singletrack, stairs or long-distance touring

What's in the Box

Before the first ride: fit the front wheel and check the axle, set the fork preload for your weight, bed the disc brakes in with ten firm stops, then charge the pack fully. At 90 lb get help lifting it out of the carton rather than doing it alone.

Color and Finish

Matte black covers the frame and fork, with black rims, a black cockpit and grey graphics on the down tube. It is a deliberately plain finish on a bike that will spend its life dusty, and the graphics are small enough that a scratch will not be obvious.

Touch-up paint is available on request. The wear points are the chainstay under the chain and the frame where the rack and fenders bolt on.

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. An 864Wh pack takes most of an evening, so start it after the ride rather than in the morning. Charge it indoors at room temperature rather than in a cold shed.

Check tire pressure before every ride: 18 to 20 psi on pavement, 10 to 12 psi on dirt and sand. Check both axles and the fork crown bolts after the first 50 miles, and check the brake pads monthly. On 20-inch tires a floor gauge is worth more than a thumb on the sidewall, and the pressure range is wide enough that the wrong setting changes how the bike steers.

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-7754963 · 20 in off-road electric bike · 1500W peak rear hub · 48V 18Ah 864Wh pack in the frame, key-locked and removable · 25 to 31 miles listed range · 31 mph listed · Kenda 20 x 4.0 off-road tires on black rims · disc brakes front and rear · coil-sprung suspension fork with a rigid rear triangle · five riding modes on the bar · LCD display · throttle and pedal assist · LED headlight · front and rear fenders · rear rack · 90 lb complete · matte black with grey graphics · built for fire roads, farm tracks and campgrounds rather than tight singletrack or stairs · peak and continuous output are different figures · key-locked pack with a sealed charge port · four to five hour charge · ships with charger, two battery keys, tool kit and manual · fenders and rear rack fitted at the factory