HKM-8092243 Fat Tire E-Bike Runs a 3000W Hub at 40 mph on Two 60V Packs With 93 Miles and Hydraulic Shocks and 7 Speeds

3000W · 2400Wh · 93 miles · 40 mph · 90 Nm · hydraulic discs · 7-speed · cast wheels · 300 lb load

An Alloy Frame Hydraulic Shocks and a Front Bag for the Long HaulTwo Packs and One Long Way to Go

A 20-inch fat tire e-bike with a 3000W peak rear-drive hub making 90 N·m, two 60V packs totalling 40Ah and 2400Wh in RONZLLA-branded boxes, and a listed 93 miles of range. Up to 40 mph on the flat and a 35 percent max slope, hydraulic disc brakes and hydraulic shocks at both ends, seven-speed Shimano gears and cast five-spoke wheels. The alloy frame weighs 105 lb, carries 300 lb, and wears a front storage bag under the bars.

The pair of battery boxes is what this bike is built around: one behind the seat tube and one in the down tube, both with their own lock, both marked with the brand. Together they hold 40Ah and 2400Wh, which is why the listed range reaches 93 miles and why the machine is not light. The boxes sit low and central, so the bike leans into a turn rather than wanting to tip away at walking pace.

The honest trade is size and mass. At 105 lb it wants a ramp or a second pair of hands to load, and the wheelbase that makes it stable at 40 mph is the same one that makes it slow to steer in a car park. What you get for that is an alloy frame rated to 300 lb of rider and cargo and hydraulic hardware at both ends.

At a Glance

• 3000W Peak Hub — Rear-drive, 90 N·m of torque
• Two 60V Packs — 40Ah and 2400Wh across both boxes
• 93 Miles — Listed range, single charge
• 40 mph Top Speed — Up to 40 mph, listed
• 35 Percent Slope — Maximum grade, listed
• Hydraulic Shocks — Front and rear, twin at the back
• Hydraulic Discs — Front and rear calipers
• 7-Speed Shimano — Gears behind the hub motor
• Cast Five-Spoke Wheels — 20 x 4.0 puncture-resistant tires
• Alloy Frame — 105 lb, carries 300 lb
• Front Storage Bag — Under the bars, included
• Three Riding Modes — Plus a bright LED lamp set

Twin Battery Boxes and Cast Wheels

The frame is an alloy loop with a battery box behind the seat tube and a second in the down tube, both wearing the brand plate and both locking separately. A round angel-eye headlight sits above the front fender, a storage bag straps under the bars, and the long bench adjusts in height so the reach suits shorter and taller riders.

The wheels are cast five-spoke units in black rather than laced spokes, wrapped in 20 x 4.0 puncture-resistant fat tires. Cast wheels mean there is no spoke tension to check and nothing to go out of true; the trade is that a bent rim is replaced rather than trued. The wide casing floats on sand and gravel at low pressure.

Suspension is hydraulic at both ends: a fork up front and twin hydraulic shocks under the bench at the rear. Braking is hydraulic discs on both wheels, with the levers set for a two-finger pull. At the speeds this bike can reach, that combination is what keeps it controlled rather than merely fast.

• Frame: alloy, twin battery boxes
• Packs: two 60V, 40Ah and 2400Wh total
• Wheels: cast five-spoke, 20 in
• Tires: 20 x 4.0 puncture-resistant
• Shocks: hydraulic, front and twin rear
• Brakes: hydraulic disc, both wheels

Fitted as shipped: the angel-eye LED headlight, an LED tail, front and rear fenders, the front storage bag, the adjustable bench, a kickstand and platform pedals. The bars carry the throttle, the three-mode switch, the brake levers and a display, and each battery box has its own key and charge port.

3000W Peak and 2400Wh

The motor is a 3000W peak rear-drive hub making 90 N·m of torque, which is the figure that matters on a 35 percent slope: torque is what keeps the wheel turning when the grade wants to stop it. The listed top speed is up to 40 mph, so this is a machine for private ground and OHV areas rather than a bike lane.

The batteries are two 60V packs totalling 40Ah and 2400Wh in LG cells. The listed range is up to 93 miles on a single charge, which assumes low assist and a light hand; at speed, on sand or with a heavy rider, plan on half. Charging both packs is an evening job across two ports.

Three riding modes let you trade that range for pace, and the seven-speed Shimano drivetrain means the pedals are a fallback rather than decoration. The front storage bag is the small feature that gets used every ride: tools, a lock and a phone live there instead of in a backpack.

Who It Fits and How It Rides

The bench adjusts in height and the bars are high, so a wide range of riders fit without compromising the reach. The load rating is 300 lb of rider and cargo, which covers a heavy adult with a pack, and at 105 lb the bike is a two-person lift onto a truck bed rather than a one-handed carry.

On gravel, packed dirt and sand it tracks straight, the hydraulic shocks keep the bench level and the fat casing floats. On pavement it is quick rather than nimble and the tires hum, which is the price of the wheelbase and the rubber. Treat 40 mph as a private ground number and check what your area allows.

• Fire roads, gravel and beach tracks
• Long loops where range is the point
• Private ground and OHV areas
• Not for bike lanes or a roof rack

What's in the Box

Before the first ride: fit the front wheel and torque the axle, set the bars square, set the shock preload for your weight, bed the hydraulic brakes in with ten firm stops from a walking start and charge both packs. Budget 40 to 60 minutes, and check the axle nuts and the stem bolts after the first ten miles.

Color and Finish

The bike is black throughout: frame, both battery boxes, the cast wheels, the fenders, the fork and the bench. The only other marks are the white brand plates on the two battery boxes, the lettering on the front bag and the machined ring around the headlight.

Touch-up paint in satin black is available on request. The wear points are the battery box corners where a boot catches them, the frame rail under the bag and the fender edges.

Battery Care and Maintenance

Two packs, two routines: charge each between 20 and 90 percent for daily use, take both to full once a month so the cells balance, and never charge below freezing. If the bike will sit for a month, leave both around half charge and top them up every few weeks. Keep the port covers shut after a wet ride.

Check tyre pressure before every ride at 15 psi on pavement and 8 on soft ground, and check the cast wheels for cracks rather than spoke tension. The hydraulic brakes want the pads checked monthly and the lever watched for sponginess, and the shocks want a wipe of the stanchions after a muddy ride. Keep the chain oiled so the seven speeds shift.

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-8092243 · dual battery fat tire electric bike · 3000W peak rear-drive hub with 90 N·m · two 60V packs totalling 40Ah and 2400Wh in brand-marked boxes · up to 93 miles of range · up to 40 mph top speed and a 35 percent maximum slope · hydraulic disc brakes and hydraulic shocks at both ends, twin at the rear · 20 x 4.0 puncture-resistant fat tires on cast five-spoke wheels · 7-speed Shimano drivetrain · adjustable bench and a front storage bag · angel-eye LED headlight and LED tail · 105 lb alloy frame carrying 300 lb of rider and cargo · three riding modes · 60V charger and keys for both boxes in the carton · built for fire roads, gravel and beach tracks on private ground rather than bike lanes