HKM-9169747 Full Suspension Fat Tire E-Bike Climbs 30 Degrees on 85 Nm and a 960Wh Pack for 37 Miles and 7 Speeds

750W · 960Wh · 25-37 mi · 20 x 4.0 · hydraulic dual discs · 85 N·m · 330 lb load

Removable Pack Dual Coil Shocks and Fat Tires for Forest TrailsTwo Coils and a Trail Day at a Time

A full suspension fat tire electric bike with a 750W brushless hub in the rear wheel, a removable 48V 20Ah pack worth 960Wh in the frame, and 20 x 4.0 puncture-resistant tires. A suspension fork and dual rear coil shocks, hydraulic disc brakes at both wheels and a Shimano seven-speed drivetrain, all read from an LCD with a phone holder on the bars. Listed at 25 to 37 miles per charge, 85 N·m of torque and a 330 lb load rating.

The full suspension is what this build is sold on: a suspension fork up front and two coil springs under the seat, so roots, rocks and broken pavement get filtered instead of passed to the rider. The frame is high carbon steel under the paint, the bench seat lets the rider move for a turn, and the pack sits in the frame where the mass wants to be. It is the format for forest roads and mountain trails as much as the daily loop.

The honest trade is weight and rules. A steel full-suspension bike with fat tires is not light, and a listed 28 to 31 mph wants a helmet every ride and a look at local rules before it mixes with traffic. Three ride modes keep the range story flexible, and the fat casing carries the comfort on the days the suspension does not.

At a Glance

• 750W Rear Hub — Brushless rear hub motor
• 960Wh Pack — 48V 20Ah, removable in the frame
• 25 to 37 Miles — Range as listed per charge
• 28 to 31 mph — 45 to 50 km/h as listed
• 20 x 4.0 Tires — Puncture-resistant all-terrain
• Full Suspension — Fork plus dual rear coil shocks
• Hydraulic Dual Discs — Front and rear
• Shimano 7 Speed — Thumb shifter on the bars
• 85 N·m Torque — Climbs 30 degrees as posted
• 330 lb Load Rating — 150 kg, on an 88 lb bike
• LCD Display — Speed, mileage, battery, PAS
• Phone Holder — With USB charging on the bars

Full Suspension and Stopping Power

The frame is high carbon steel in a full suspension layout, welded so the rear end can move instead of passing every root straight to the saddle. Steel tolerates the knocks of a bike that gets used off-road, and the pack sits inside the triangle where the mass stays low and centered.

Up front is a suspension fork over the 20-inch wheel, and under the seat sit two coil springs with the valving to match. Together they keep the tires planted on washboard and rock gardens, which is where fat tires earn their keep.

Braking is hydraulic discs at both wheels, with a rotor on each hub and the red calipers that ship on this build. Hydraulic lines self-adjust at the caliper so the lever feel stays firm as the pads wear, and one finger at each end parks it on a slope.

• Frame: high carbon steel, full suspension
• Front fork: suspension over the 20 in wheel
• Rear: dual coil shocks under the seat
• Brakes: hydraulic disc, front and rear
• Tires: 20 x 4.0 puncture-resistant
• Drivetrain: Shimano 7-speed derailleur

Fitted as shipped: the LED headlight and tail light, the LCD on the bars, the phone holder with USB charging, a bench seat and platform pedals. The bars carry the throttle, the Shimano thumb shifter and the brake levers.

750W Hub and the Removable Pack

The motor is a 750W brushless hub in the rear wheel, quoted at 85 N·m of torque and good for 30 degree climbs on the poster. It pulls from a stop clean and holds a trail pace, and the Shimano seven-speed drivetrain behind it means the pedals are a real fallback when the pack runs flat. It is the size of motor that suits a steel bike carrying a rider and a day pack. Brushless hubs run quiet and ask for nothing beyond a tight axle nut.

The pack is 48V 20Ah, worth 960Wh, and it lifts out of the frame so it can charge at a desk rather than next to the bike. We quote 25 to 37 miles per charge, the conservative span; the source pages claim 50 miles on throttle and more on pedal assist, so treat 37 as the number a plan holds to. A management system balances the cells and guards against overdraw, and charging takes four to six hours.

The LCD shows speed, mileage, battery level and the assist setting, and the phone holder with its USB charging port keeps a navigation screen alive on a long loop, topped up while the miles roll by. Three ride modes, throttle, pedal assist and plain pedaling, switch from the bars.

Forest Roads and Snow Days

This bike is built for the four terrains the poster prints: forest road, mountain road, beach path and snow. The full suspension and the 4.0-inch casings do the work, and the 330 lb load rating means a rider with a day pack stays well inside the design envelope.

The puncture-resistant 20 x 4.0 tires are the other half of the story: the wide contact patch floats over soft ground and the reinforced casing shrugs off the thorns and flint that stop a street tire.

• Forest roads and mountain trails
• Beach paths and snow days
• Daily loops with a loaded bag
• Not for stairs or a roof rack

What's in the Box

Partially assembled on arrival: fit the front wheel, the handlebar and the pedals, then torque-check every bolt and charge the pack before the first ride. Budget 30 to 45 minutes, then recheck the axle nuts and the bars after the first ten miles.

Color and Finish

One finish: black over the steel frame, with the perforated silver side panel doing the graphic work. The only bright pieces are the red brake calipers and the rotor faces, and the fork stanchions keep their chrome against all the dark paint.

The wear points are the fork stanchions, which want a wipe after a wet ride, the chainstay where the chain slaps, and the seat corners where a bag rubs.

Battery Care and Maintenance

One full charge before the first ride, then keep the 960Wh pack near the middle of its band for daily use and take it to full now and then so the cells balance. Charge indoors at room temperature, keep the charge port covered between sessions, and store the pack around half charge if the bike will sit for a month.

Each ride starts with a tire pressure check and a squeeze of both brake levers. Hydraulic pads want a look monthly, the seven-speed chain wants a wipe and a drop of lube, and the coil shocks want their sag set to the rider now and then. Keep the axle nuts tight, wipe the frame after wet rides, and never aim a pressure washer at the connectors. A gritty chain eats range before the pack does.

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-9169747 · full suspension fat tire electric bike · 750W brushless rear hub · 85 N·m of torque and 30 degree climbs as posted · removable 48V 20Ah pack worth 960Wh · 25 to 37 miles per charge as the conservative span · 28 to 31 mph top speed · four to six hour charge · 20 x 4.0 puncture-resistant fat tires · high carbon steel frame · suspension fork and dual rear coil shocks · hydraulic disc brakes front and rear · Shimano seven-speed derailleur · three ride modes: throttle, pedal assist and pedal · LCD with speed, mileage, battery and assist level · LED headlight and tail light · phone holder with USB charging · 330 lb load rating · 88 lb bike weight · black finish · forest roads, mountain trails, beach paths and snow days