SKU: 93987698963

HKM-678803 750W Electric Fat Tire Bike - 20 Inch Wheels, 7 Speed, 48V Lithium Battery, Classic Cafe Racer Design

Sale price$427.50 Regular price$475.00
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Ships within 48 hours · Estimated delivery Jul 26 - Jul 31

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Description

HKM-678803 750W Electric Fat Tire Bike - 20 Inch Wheels, 7 Speed, 48V Lithium Battery, Classic Cafe Racer DesignHKM678803 750W Electric Fat Tire Bike Cafe racer silhouette meets modern electric performance a bold machine for urban streets and beyond. The HKM678803 fuses retro caf racer aesthetics with a hightorque 750W rearhub motor, chunky 20inch fat tires, and a meticulously engineered 48V drive system. Its stance is aggressive yet refined, delivering a riding experience that feels equally at home carving through downtown traffic or kicking up dust on gravel

HKM‑678803 750W Electric Fat Tire Bike

Cafe racer silhouette meets modern electric performance — a bold machine for urban streets and beyond.

The HKM‑678803 fuses retro café racer aesthetics with a high‑torque 750W rear‑hub motor, chunky 20‑inch fat tires, and a meticulously engineered 48V drive system. Its stance is aggressive yet refined, delivering a riding experience that feels equally at home carving through downtown traffic or kicking up dust on gravel trails. Every detail — from the color‑matched frame welds to the intuitive digital cockpit — has been designed for riders who refuse to compromise on style or substance.

⚡ 750W Nominal Power 🔋 48V Li‑ion System ⚙️ Shimano 7‑Speed 🛡️ Disc Brakes 🖥️ Digital Display 🏍️ Cafe Racer DNA

Performance‑Engineered Drive System

750W High‑Torque Rear Hub Motor

The gearless brushless motor delivers instant thrust and quiet operation. With a peak output well above nominal, it tackles 15‑degree inclines without hesitation, offering a throttle‑controlled max speed of 31 mph (50 km/h) and a pedal‑assist sweet spot for cruising around 19 mph (30 km/h).

48V High‑Density Lithium Battery

The removable 48V lithium‑ion pack employs smart BMS (Battery Management System) for over‑charge, over‑discharge, and temperature protection. Real‑world range spans 19–37 mi (31–60 km) depending on assist level, rider weight, and terrain — enough for a full week of commuting between charges.

Top Speed

31 mph (50 km/h)

Max Range (Pedal Assist)

37 mi (60 km)

Rider‑Focused Control & Comfort

Front Suspension Fork

A telescopic front fork with progressive spring damping irons out potholes, curbs, and trail chatter. The responsive travel maintains steering precision while notably reducing rider fatigue over long distances.

Shimano 7‑Speed Drivetrain

The crisp, reliable Shimano rear derailleur puts seven perfectly spaced ratios at your thumb. Shift seamlessly on the move — whether you’re accelerating from a stoplight or climbing a loose‑gravel incline.

Dual Disc Brakes

Mechanical disc brakes front and rear deliver consistent, powerful stopping performance in rain, dust, or mud. The large rotors shed heat quickly, giving you confident control on steep descents.

Backlit Digital Cockpit

The centrally mounted LCD screen presents real‑time speed, battery gauge, assist level, odometer, and trip distance at a glance. The anti‑glare surface remains readable even in direct sunlight.

Iconic Cafe Racer Styling, Robust Build

The HKM‑678803’s elongated saddle, dropped handlebar stance, and sculpted frame evoke the golden era of custom motorcycles — yet every tube and weld is engineered for modern e‑bike durability. Fat 20‑inch tires provide a generous contact patch, absorbing vibrations and enhancing stability on pavement, hardpack, and loose surfaces alike.

20" × 4.0" Fat Tires

Puncture‑resistant compound with aggressive tread blocks for confident grip on diverse terrain.

High‑Tensile Steel Frame

Net weight 92.6 lb (42 kg), payload capacity 101.4 lb (46 kg) — robust yet manageable.

Available Colorways

Black
Camouflage
Orange
Blue

Technical Specifications

Motor: 750W brushless rear hub (nominal)
Battery: 48V Lithium‑ion, removable, smart BMS
Top Speed: 31 mph (50 km/h) — throttle / 19 mph (30 km/h) — assist
Range: 19–37 mi (31–60 km), depending on mode & terrain
Tires: 20" × 4.0" fat tires, puncture‑resistant
Brakes: Mechanical disc, front & rear
Display: LCD, backlit, speed/battery/assist/odo
Gearing: Shimano 7‑speed derailleur, thumb shifter
Suspension: Front suspension fork, coil spring
Net Weight: 92.6 lb (42 kg)
Max Load: 101.4 lb (46 kg) rider + gear

Intelligent Ride Technology

Beyond the raw numbers, the HKM‑678803 integrates subtle yet impactful smart features that elevate everyday usability. The controller delivers smooth, ramped power delivery — no jerky starts — while regenerative‑style engine braking helps preserve brake pads on long descents. An optional walk‑assist mode lets you push the bike effortlessly when dismounted. The twist throttle and cadence‑based pedal assist work in harmony, offering five levels of assistance that you can tailor to your fitness level or desired range.

Three Ride ModesEco (maximizes range), Normal (balanced assist), Sport (full 750W punch) — selectable on the fly via the handlebar control pad.

Advantages Over Conventional E‑Bikes

Fat Tire Versatility

20x4.0 tires float over sand, snow, and roots — terrain that stops skinny‑tire commuters in their tracks.

Retro‑Modern Identity

Cafe racer styling isn’t just aesthetic — the lower center of gravity enhances cornering stability and rider confidence.

Shimano Reliability

Unlike generic derailleurs, genuine Shimano indexing provides crisp, miss‑free shifts — ride after ride.

Frequently Asked Questions

What real‑world range can I expect?

Range varies with rider weight, terrain, assist level, and weather. In Eco mode on flat pavement, experienced riders report up to 37 mi (60 km). Sport mode with throttle usage typically yields around 19–24 mi (31–38 km).

Is the battery removable for charging?

Yes. The 48V pack slides out with a key‑lock mechanism, allowing you to charge indoors or swap with a spare for extended adventures.

Does it ship as a class 2 or class 3 e‑bike?

The HKM‑678803 can be configured via its display to comply with local regulations. It supports both throttle‑only operation (Class 2) and pedal‑assist up to 28 mph (45 km/h) where permitted. Always check your local e‑bike laws.

What is the recommended rider height?

The frame geometry suits riders between 5'4" and 6'4" (162–193 cm) comfortably. The seat post and handlebar offer generous adjustability.

Purchase Protection & Peace of Mind

Free Shipping

On all orders, no minimum — straight to your door.

180‑Day Purchase Protection

Extended coverage against manufacturing defects.

30‑Day Money‑Back Guarantee

Not satisfied? Return within 30 days for a full refund.

24‑Month Warranty Service

Comprehensive coverage on motor, battery, and frame.

Experience the fusion of vintage charisma and electric innovation. The HKM‑678803 750W Electric Fat Tire Bike — designed for the modern explorer.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 93987698963

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4.6 ★★★★★
Based on 5 reviews
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Product Reviews
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Verified Purchase
David Miller
Omaha, US
★★★★★ 5
Great quality chair, regardless of price.
Color: Black+white, Size: Pack of 1, Color: Black+white, Size: Pack of 1
Great quality chair, regardless of the price, period. So well packaged that it took almost as long to unwrap as assemble. Assembly was easy (loved the Allen wrench with sturdy handle). I am 6'2" and the fit and height adjustments work well for my height. Comfort is personal, so I like the semi-firmness of the seat. While the chair is constructed of heavy gauge plastic the base is solid metal with enamel finish: I love the look. The arm rests line up perfectly to my computer keyboard. I expect many, many years of service.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
E
Verified Purchase
EJ
West Palm Beach, US
★★★★★ 5
Great Value for a Comfortable Home Office Chair
Color: Black, Size: Pack of 1, Color: Black, Size: Pack of 1
I’ve been using this chair for a couple of days now, and honestly, it’s been a solid upgrade from my old one. I work from home most days, so comfort matters a lot—and this chair delivers better than I expected for the price. The first thing I noticed was the lumbar support. It’s actually adjustable and makes a noticeable difference, especially if you tend to sit for long stretches. My lower back used to get sore after a few hours, but that hasn’t really been an issue since switching to this chair. The mesh back is also a nice touch—it keeps things breathable, which I didn’t think I’d care about until I had it. Assembly was pretty straightforward. Took me maybe 20–25 minutes without any frustration. Everything lined up well, and the instructions were clear enough. In terms of comfort, the seat is firm but not hard. It doesn’t feel like one of those super plush chairs, but I actually prefer that because it feels more supportive over time. The reclining feature is smooth, and I like that you can lean back a bit when you need a break. Overall, I’d say this is a great value for a home office setup. If you want something ergonomic and comfortable without spending a fortune, this chair is definitely worth considering.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
A
Verified Purchase
Amazon Customer
Boise, US
★★★★★ 5
Excellent Office Chair
Color: Black+white, Size: Pack of 1
I just received my TRALT Office Chair. First of all, I was impressed with the packaging of this item. When I opened the box each piece of the chair was wrapped in plastic or bubble wrap. Everything in the box arrived safely and without damage. Secondly, the instructions to assemble the chair were very each to follow. I was impressed with the Allen wrench which had a handle attached to it. This made screwing in the screws very easy. I was able to assemble the chair without any difficulty. Lastly, the look of the chair and the comfort is exceptional. I ordered the black/white chair which looks amazing. The comfort of the chair is really excellent. My back is supported by the lumbar seat and having the armrests being able to go up when not needed is wonderful. The quality of the chair is definitely worth the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
J
Verified Purchase
Jennifer3002
Phoenix, US
★★★★★ 4
a good choice
Color: Black, Size: Pack of 1, Color: Black, Size: Pack of 1
Assembled chair only to find that the lift cylinder was faulty. Would have preferred to be able to just get a replacement cylinder but calling China didn't seem like a viable option. Guessing which one & buying it online would involve paying for a good portion of what the chair cost. Customer service could only offer a replacement or refund. We're disassembling (so much fun?!) to send it back. The chair itself was very comfortable, assembled fairly easily and instructions pretty clear. Again, if we could only have asked the seller for the replacement part......**Update**...Or if the instructions that seemed so clear were clearer!, as we started to disassemble, we decided to see what would happen if the tension knob (see photo) was loosened. IT ALLOWED THE LIFT CYLINDER TO WORK. Not at all what the instructions say. At any rate, we're keeping the chair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
J
Verified Purchase
jinju jiang
Bozeman, US
★★★★★ 5
This chair is amazing
Color: Sky Blue, Size: Pack of 1, Color: Sky Blue, Size: Pack of 1
⭐⭐⭐⭐⭐ Absolutely love this chair! It was super easy to assemble—I had it set up in no time with clear instructions and minimal effort. The comfort level is fantastic; the seat cushion is just right and the back support makes it great for longer sitting sessions. The color is beautiful in person—clean, modern, and adds a fresh pop to the room without being overwhelming. I also really like the smooth wheels and sturdy build; it feels stable and well-made. Overall, this is a great combination of style, comfort, and value. Highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026

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