HKM-9304659 Cargo E-Bike Runs a 1000W Hub on 20 x 4.0 Tires with a 48V 17.5Ah Pack and Hydraulic Discs for Deliveries

1000W · 48V 17.5Ah 840Wh · 20 x 4.0 · 37 mi · hydraulic discs · cargo rack · 77 lb

A Cargo Rack Hydraulic Discs and a Pack That Goes the DistanceCarry More Than You Ever Planned

A 1000W rear hub, a 48V 17.5Ah 840Wh pack in the frame, 20 x 4.0 knobby tires, a suspension fork and hydraulic disc brakes front and rear, with a cargo rack over the rear wheel. It is listed at 37 miles and 31 mph, weighs 77 lb, and it is built around the load: the rack, the brakes and the fat tires are all chosen for carrying something rather than for going fast, and the 77 lb weight is what that decision costs.

Cargo bikes live or die on three things: a rack that does not sway, brakes that stop a loaded bike, and a motor that does not stall at the bottom of a hill. This one answers all three with a frame-mounted rack, hydraulic discs at both ends, and a 1000W hub that pulls from a standstill with a crate on board. If any one of those three is compromised the bike becomes a compromise everywhere, which is why cargo builds cost more than they look like they should.

What you give up is agility and weight. At 77 lb with a load on the back it is not a bike you flick through traffic, and the 20-inch wheels make it feel shorter and more nervous at speed than a 26-inch cargo build. It is a working bike, and it rides like one. Load it and the character changes completely.

At a Glance

• 1000W Rear Hub — Brushless hub with throttle and pedal assist
• 840Wh Pack — 48V 17.5Ah in the frame, key-locked
• 37 Miles Listed — Assist range, less on the throttle
• 31 mph Listed — Above the Class 3 line in most states
• 20 x 4.0 Knobby — Fat casing for gravel and broken pavement
• Hydraulic Discs — Front and rear, with motor cut-off
• Cargo Rack — Frame mounted over the rear wheel
• Suspension Fork — Coil sprung, rigid rear triangle
• 77 lb Complete — 35 kg with the battery aboard
• LCD Display — Speed, battery, assist and trip
• Fenders — Front and rear, fitted
• Kickstand — Side-mount, load rated

Frame, Rack and Fat Tires

The frame is a step-through alloy with the 840Wh pack inside the main triangle and a cargo rack bolted over the rear wheel. The rack is fixed to the frame rather than clamped to the seat post, which is the difference between a load that tracks straight and a load that wallows.

Up front there is a coil-sprung suspension fork and the rear is rigid. On 20 x 4.0 tires that is the right split for a cargo bike: the tire and the fork absorb the road, and the rigid rear keeps the rack level when the load shifts.

The cockpit carries an LCD in the middle, a throttle on the right and the usual brake levers. The stand is a side-mount rated for a loaded bike, which sounds like a detail until you try to park 77 lb of bicycle with a crate on it on a slope.

• Frame: step-through alloy, battery in the frame
• Rack: frame mounted over the rear wheel
• Fork: coil-sprung suspension
• Rear: rigid triangle
• Brakes: hydraulic disc, front and rear
• Tires: 20 x 4.0 knobby

Fitted as shipped: front and rear fenders, the cargo rack, an LED headlight, a kickstand and the battery keys. The tires are 20 x 4.0 knobby, which is what makes a gravel yard and a potholed back street usable with a load aboard.

Motor, Battery and Range

The motor is a 1000W brushless rear hub. It is there for the load rather than the top speed: a 1000W hub pulls a loaded bike away from a stop without the stalling that smaller motors show, and on a 20-inch wheel it spins up quickly enough to feel strong in the first few metres. A geared hub, so it freewheels when you stop pedalling rather than dragging the wheel, which matters on a descent with a crate aboard.

The pack is 48V 17.5Ah, 840Wh, key-locked in the frame and removable for indoor charging. A full charge takes five to seven hours on the supplied charger, and the pack is light enough to carry indoors in one hand over winter. The lock sits on the frame rather than the pack, so the cover stays with the bike when the battery comes out for charging.

Range is listed at 37 miles on assist, and less with a load or on the throttle. For cargo use the honest planning number is 25 miles, which covers a morning of errands with a margin rather than a full day of deliveries. Plan errands around 25 miles and you will not be caught out.

Who It Fits and How It Rides

One frame size covers riders from about 5 ft 4 in to 6 ft 3 in, and the step-through frame means you can get on with a bag in one hand. Shorter riders find the 20-inch wheels easy to put a foot down beside, which matters when the bike is loaded.

Loaded, it is calm and slow to steer; empty, it is quicker than it looks and the knobby tread reminds you that this is not a road bike. The hydraulic discs are the part that earns its keep: they stop a loaded 77 lb bike with two fingers where cable discs would need the whole hand.

• Cargo runs, deliveries and grocery hauls
• Errands with a crate strapped to the rack
• Gravel yards, back streets and broken pavement
• Not for fast road riding or lifting onto a rack

What's in the Box

Before the first ride: fit the front wheel and check the axle, set the fork preload, bed the hydraulic brakes in with ten firm stops, and check the rack bolts before you load it. Charge the pack fully, and load the crate low and centred rather than high and to one side.

Color and Finish

Matte black covers the frame, fork and rack, with black rims, a black cockpit and small white graphics on the down tube. It is the plainest finish in the range, which suits a bike whose job is to be scratched by crates and bungee hooks.

Touch-up paint is available on request. The wear points are the rack deck, the chainstay under the chain and the dropouts where the fender stays 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 840Wh pack takes most of an evening, so start it after the last run of the day. Charge it indoors rather than in a cold garage, and let a cold pack warm up first.

Check tire pressure before every loaded ride: 18 to 20 psi on pavement, 10 to 12 psi on gravel. Check the rack bolts and both axles after the first 50 miles, and check the hydraulic pads monthly, since a loaded bike wears them faster. Check the spoke tension on the rear wheel after the first 20 rides, since a hub motor loads that wheel harder than a bicycle hub does, and check the rack bolts on the same schedule.

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-9304659 · 20 in cargo electric bike · 1000W brushless rear hub · 48V 17.5Ah 840Wh pack in the frame, key-locked and removable · 37 miles listed range · 31 mph listed · 20 x 4.0 knobby tires on black rims · hydraulic disc brakes front and rear with motor cut-off · coil-sprung suspension fork with a rigid rear triangle · frame-mounted cargo rack over the rear wheel · LCD display · throttle and pedal assist · LED headlight · front and rear fenders · load-rated side stand · 77 lb complete · matte black with white graphics · built for cargo runs, deliveries and grocery hauls rather than fast road riding · key-locked pack with a sealed charge port · five to seven hour charge · ships with charger, keys and tools · fenders and cargo rack fitted at the factory