HKM-8944211 Tank Box Moped Fat Tire E-Bike Refills 768Wh in about Three Hours and Runs 31 mph on Street Tread Tires

1000W · 768Wh · 19-37 mi · 20 x 4.0 · hydraulic discs · 7-speed · LCD · bench seat

A Tank Battery Mid Basket and Fat Street Tires for Daily ErrandsSmall Town Loops on One Tank Bike

A moped-style fat tire electric bike with a 1000W brushless hub in the rear wheel, a 48V 16Ah pack worth 768Wh in the molded tank under the bars, and 20 x 4.0 fat tires on six-spoke mag wheels. A suspension fork up front, hydraulic disc brakes at both wheels, a seven-speed derailleur and a mid frame basket under a long bench seat. Listed at 19 to 37 miles per charge and 31 mph, with an LCD on the bars and about three hours to a full charge.

The tank-and-basket shape is the point of this build: a moped-style loop frame carrying a long bench, a wired cargo basket between the wheels and the pack locked in the molded tank under the bars. It swallows a lock, a jacket and a grocery run in that basket without a rack bolted on afterward, which is what makes it useful on a Tuesday. The bench lets the rider shift weight for a turn rather than being pinned in one position, and the low frame keeps both feet easy to the ground at a stop.

The honest trade is the tire choice. The 20 x 4.0 casings wear a street tread, so they roll quiet and grip broken pavement, gravel lots and wet bike paths, but they are not mud knobbies, and the rigid rear loop leans on the fat tires for cushion. At a listed 31 mph the bike also wants a helmet and a look at local rules before it mixes with traffic.

At a Glance

• 1000W Rear Hub — Brushless, in the back wheel
• 768Wh Tank Pack — 48V 16Ah, key lock under the bars
• 19 to 37 Miles — Range as listed per charge
• 31 mph Top Speed — 50 km/h as listed
• 20 x 4.0 Fat Tires — Street tread on mag wheels
• Hydraulic Discs — Front and rear
• 7-Speed Derailleur — Thumb shifter on the bars
• Front Suspension Fork — Over the 20 inch wheel
• Mid Frame Basket — Cargo space between the wheels
• Long Bench Seat — Brown or black, per the bike
• LCD Display — Speed, battery, assist level
• Black And White — Two finishes pictured

Moped Loop and Stopping Power

The frame is a moped-style loop that drops the rider into the middle of the bike with the basket within reach. The shape does work a step-over diamond cannot: a step through the middle, a bench to slide along, and a standover short enough for a quick stop with both feet down.

Up front is a suspension fork over the 20-inch wheel, and the steering is the relaxed kind: high bars, an upright reach, and a straight track at walking pace. The back half is a rigid loop, so the fat casing and the bench do the rest of the smoothing.

Braking is hydraulic discs at both wheels, with a rotor on each hub and a lever feel that stays firm as the pads wear. Hydraulic lines self-adjust at the caliper so the lever does not creep in between services, and one finger at each end parks it on a slope.

• Frame: moped-style loop with a bench seat
• Suspension: front fork over the 20 in wheel
• Brakes: hydraulic disc, front and rear
• Drivetrain: 7-speed derailleur
• Tires: 20 x 4.0 fat, street tread
• Lighting: round headlight and tail lamp

Fitted as shipped: the round headlight and tail lamp, front and rear fenders, the mid frame basket, a side stand and platform pedals. The bars carry the throttle, the seven-speed thumb shifter, the brake levers and the LCD.

1000W Hub and the 768Wh Tank Pack

The motor is a 1000W brushless hub in the rear wheel, the size that suits a moped frame carrying a rider and a full basket. It pulls away from a light clean without drama and holds a steady cruise on a flat bike path, and the seven-speed drivetrain behind it means the pedals are a real fallback when the pack runs flat rather than decoration. Brushless hubs run quiet and ask for nothing beyond a tight axle nut.

The pack is 48V 16Ah, worth 768Wh, and it lives in the molded tank in front of the seat where the frame already wanted mass, locked with a key. We quote the listed span of 19 to 37 miles per charge: throttle-only riding and cold weather land near 19, while light pedal assist on firm pavement reaches the top of the range. Charging from empty takes about three hours on the included charger.

The LCD shows speed, battery level and the assist setting at a glance, and the throttle sits under the right hand for the moments when pedaling a loaded moped through soft ground would only spin the wheel. The power button arms the system with a long press and toggles modes with a short one. Acceleration is smooth from a standstill.

Errands, Bike Paths and Broken Pavement

This bike is built around short, loaded trips: a grocery run, a coffee loop, the ride across town that a car is silly for. The basket sits low between the wheels so a loaded bag does not swing off the back and change the steering, and the bench makes two stops in ten minutes painless.

The 20 x 4.0 street casings are why the route can run gravel lot, bike path, wet pavement and a sandy shoulder without a tire swap. The fat casing takes the edge off broken pavement on its own, which is most of the comfort story.

• Grocery runs and coffee loops
• Bike paths and broken pavement
• Gravel lots and sandy shoulders
• Packed dirt lots and towpaths
• 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

Two finishes are pictured and both keep the hardware dark: cream white over a brown bench, and black on black with a black saddle. Each wears black mag wheels, black fork lowers and black fenders, and the only bright work is the rotor faces and the small reflectors.

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

Battery Care and Maintenance

One full charge before the first ride, then keep the 768Wh 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 wear slower than cable discs but they still want a look monthly, and the chain wants a wipe and a drop of lube so the seven speeds shift clean. Keep the basket bolts and the axle nuts tight, wipe the frame with a damp cloth after wet rides, and never aim a pressure washer at the connectors.

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-8944211 · moped style fat tire electric bike · 1000W brushless rear hub · 48V 16Ah pack worth 768Wh in the molded tank under the bars · 19 to 37 miles per charge as listed · 31 mph top speed, about 50 km/h · three hour charge · 20 x 4.0 fat street tires on six-spoke mag wheels · moped loop frame with a long bench seat · suspension fork up front with a rigid loop at the back · hydraulic disc brakes front and rear · 7-speed derailleur with a thumb shifter · mid frame cargo basket between the wheels · LCD with speed, battery and assist level · round headlight and tail lamp · fenders and side stand fitted · cream white and black finishes · built for errands, bike paths and the slow way home