HKM-1752531 1500W peak / 1000W rated rear hub 48V 20Ah 960Wh 20 x 4.0 Chaoyang Hydraulic Disc 28 mph Dual Shock

HKM-1752531 · 20 in dual suspension e-bike · 20 x 4.0 in (51 x 10 cm) · 88 lb (40 kg) complete

A 20-Inch Fat Tire Moto Style E-Bike With Dual Suspension1500W 48V 20Ah 20 x 4.0 Fat Tire

A 1500W peak rear hub rated at 1000W, a 48V 20Ah 960Wh pack in the frame, Chaoyang 20 x 4.0 fat tires, a dual-crown fork with a rear coil shock, hydraulic disc brakes and a rear rack. Listed at 28 mph, 40 miles on throttle and 70 on pedal assist, with a 330 lb load rating.

The layout is a small motorcycle rather than a bicycle: a step-over alloy frame with a long flat top tube, a dual-crown fork, a rear coil shock and wide bars. At 88 lb complete it is a two-person lift into a truck bed and not a bike you carry up a flight of stairs.

What that buys you is a 20-inch fat tire machine that holds 28 mph with a load, sits stable on gravel and packed sand, and stops with 180 mm hydraulic rotors instead of cable discs that fade on a long descent.

At a Glance

• 1500W Peak Hub — 1000W rated rear hub, 60 Nm, throttle and 5 assist levels
• 960Wh Pack — 48V 20Ah lithium 18650 in the frame, key-locked
• 40 / 70 Miles — Throttle only and pedal assist, maker figures
• 28 mph Top Speed — 45 km/h, Class 2 or 3 depending on setting
• 20 x 4.0 Chaoyang — Fat tire on 20 in spoked rims
• Dual Suspension — Dual-crown fork 80 mm travel, rear coil 180 mm
• Hydraulic Discs — 180 mm rotors front and rear
• Shimano 7-Speed — 46T crank, geared to pedal a flat pack home
• Rear Rack — Frame-mounted rack for a bag or a crate
• 330 lb Max Load — 150 kg, 265 lb safe load for daily riding
• 88 lb Complete — 40 kg with the battery in the frame
• 6061-T6 Alloy — Hydroformed frame, metallic silver

Frame, Fork and Dual Suspension

The frame is hydroformed 6061-T6 aluminium with a step-over top tube, built like a small motorcycle frame rather than a bicycle diamond. The battery sits inside the top tube, low and central.

Suspension is at both ends: a 20-inch dual-crown fork with 80 mm of travel up front, and a rear coil shock with 180 mm of travel and preload adjustment at the back.

The bars are 25.6 in wide with a riser bend and the saddle sits at 35.8 in. Riders from about 5 ft 3 in to 6 ft 5 in fit the single frame size; below that the standover gets awkward.

• Frame: hydroformed 6061-T6 alloy, step-over
• Fork: dual-crown, 80 mm travel
• Rear: coil shock, 180 mm travel, preload adjustable
• Brakes: hydraulic disc, 180 mm rotors front and rear
• Drivetrain: Shimano 7-speed, 46T crank
• Load: 330 lb (150 kg) max, 265 lb (120 kg) safe load

Fitted before it ships: LED headlight, LED tail light, a rear rack bolted to the frame, alloy pedals with reflectors, and a side kickstand. The 330 lb rating is total load, with 265 lb listed as the safe load for everyday riding.

Motor, Battery and Range

The motor is a rear hub rated at 1000W continuous and 1500W peak, with 60 Nm at the wheel, fed by a grip-twist throttle and five levels of pedal assist on a speed sensor.

The pack is 48V 20Ah, 960Wh of 18650 cells, mounted in the top tube and key-locked. A 54.6V 3A charger is supplied; the listed charge time is 3.5 to 8 hours depending on how far down you run it.

Range is listed at 40 miles on throttle alone and up to 70 miles on pedal assist, maker figures on level pavement with one rider. Cold, sand and a heavy throttle hand all cut into that, so plan a delivery shift around the throttle figure.

Top speed is 28 mph (45 km/h) as configured. That is a Class 3 ceiling in most US states and above the Class 2 line, so check your state rules before using it on a road or a shared path.

Who It Fits and How It Rides

One frame size covers riders from about 5 ft 3 in to 6 ft 5 in, on a 43.3 in wheelbase with a 35.8 in seat height. At 88 lb it wants a ground-floor store, a garage or a ramp, not a stairwell.

On gravel, packed sand and broken pavement the fat tires float and both ends absorb washboard. On a bike path it is heavy and wide, which is the honest trade for the load rating and the 20 x 4.0 footprint.

• Fire roads, farm tracks, beach towns and campgrounds
• Delivery runs and errands with a bag on the rear rack
• Short city hops where a bicycle feels fragile
• Not for singletrack, jumps, or carrying it upstairs

What's in the Box

Before the first ride: fit the front wheel and check the axle, set the bar and saddle height, set the rear shock preload for your weight, and bed the brake pads in with ten firm stops from a walking start. Charge the pack fully before the first long ride.

Color and Finish

Metallic silver covers the frame and the battery case, with black rims, a black fork, a black cockpit and a black saddle. The matte silver hides dust and road film better than gloss.

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

Battery Care and Maintenance

Charge the pack between 20 and 80 percent for daily use and take it to full about once a month so the management system can balance the cells.

Charge indoors between 50 F and 90 F. Never charge a pack that has been dropped hard or submerged, and do not leave the first charge unattended.

Check tire pressure before every ride: 18 to 20 psi on pavement, 12 to 15 psi on sand. Check the shock preload at the same time if you are carrying a load.

Wipe the fork stanchions and the shock shaft after wet or dusty rides, keep grit out of the battery door seal, and check the spokes and axle nuts after the first 50 miles.

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-1752531 · 20 in fat tire electric bike · Chaoyang 20 x 4.0 tires · 1500W peak / 1000W rated rear hub · 60 Nm · 48V 20Ah 960Wh top-tube battery · 40 mi throttle / 70 mi pedal assist · 28 mph · Shimano 7-speed · hydraulic disc brakes 180 mm · dual-crown fork and rear coil shock · rear rack · LED lights · 330 lb max load · 88 lb with battery · metallic silver · built for fire roads, beach towns and delivery runs