Looking for an electric bike that handles snow, sand, gravel, and city streets — without the struggle of swinging your leg over a high frame? The K8 20″ step-through fat tire electric bike was built exactly for that. In this guide, we’ll break down everything you need to know: specs, features, ride modes, who it’s for, and how to order one in your custom color.
What Is the K8 Electric Bike?
The K8 is a 20-inch step-through fat tire electric bike designed for riders who want comfort, stability, and all-terrain capability in one machine. It combines a 500W spoke wheel motor, a 48V 10.4Ah lithium battery, and wide 20″ x 4.0 fat tires — the same style of tire found on snow bikes and beach cruisers.
The result? A ride that feels planted and confident whether you’re on pavement, packed snow, loose sand, or a bumpy gravel trail.
And because it’s a step-through frame, you don’t have to lift your leg high to get on — making it a great fit for older riders, shorter riders, and anyone carrying cargo.
Why Choose a Step-Through Fat Tire E-Bike?
Fat tire e-bikes are having a moment — and for good reason. Here’s what makes the step-through + fat tire combination so appealing:
1. Effortless mounting
The step-through aluminum alloy frame means you can get on and off without swinging your leg over a high top tube. Ideal for city commuting, grocery runs, or riders with limited mobility.
2. All-terrain stability
20″ x 4.0 fat tires provide a larger contact patch than standard bike tires, giving you better grip and shock absorption on uneven surfaces.
3. Confidence in bad weather
Snow, slush, wet leaves, sand — fat tires handle them all far better than skinny road tires.
4. Comfortable upright ride
The aluminum alloy handlebar and seat tube position you in a relaxed, upright posture — easier on your back and wrists on longer rides.
K8 Key Features at a Glance
- ⚡ 500W spoke wheel motor — strong, efficient power
- 🔋 48V 10.4Ah lithium battery — 30–40 km range per charge
- 🏔️ 20″ x 4.0 fat tires — all-terrain grip
- 🚲 Step-through aluminum alloy frame — easy mount/dismount
- ⚙️ Shimano 7-speed drivetrain — TX50 dial + ZT50 rear pull
- 🛑 Front & rear mechanical disc brakes — reliable stopping power
- 💧 IP68 waterproof 5-speed display — with USB charging
- 🔔 3-in-1 switch — horn, headlight, and turn signal
- 🛠️ Snowmobile-specific oil-damped front fork — smooth shock absorption
- 🎨 Custom colors available
- 💪 150kg load capacity
Full Specifications: K8 20″ Step-Through Fat Tire E-Bike
| Category | Specification |
|---|---|
| Model | K8 |
| Frame Material | Aluminum alloy |
| Seat Tube | Aluminum alloy |
| Handlebar | Aluminum alloy, horizontal |
| Tire Size | 20″ x 4.0 |
| Tire Type | E-bike specific fat tire |
| Motor | 500W spoke wheel |
| Battery | 48V 10.4Ah lithium |
| Range | 30–40 km |
| Speed | 25–50 km/h |
| Charger | Certified plug, 54.6VDC, 2.5mm head |
| Controller | 9-tube 25A sine wave brushless |
| Instrument | 5-speed, USB charging, IP68 waterproof |
| Switch | 3-in-1 horn / headlight / turn signal |
| Main Line | 7-in-1 IP68 waterproof cable |
| Booster | Integrated 12-magnet speed sensor |
| Front Fork | Snowmobile-specific oil-damped shock absorber |
| Axis | Five-way 100 × 175 |
| Brakes | Front & rear mechanical disc |
| Tooth Disc | Aluminum alloy crank 48T |
| Dial | Shimano TX50 |
| Rear Pull | Shimano ZT50 |
| Flywheel | Shimano 7-speed |
| Chain | Anti-rust, e-bike specific |
| Mud Board | 20″ x 4.0 semi-wrapped snow flying board |
| Car Lights | Waterproof joint, 2-in-1 function |
| Tail Lights | One-way brake light function |
| Foot Pedal | Half aluminum alloy folding pedal |
| Color | Customizable |
| Net Weight | 30 kg |
| Gross Weight | 40 kg |
| Load Capacity | 150 kg |
| Packaging Size | 148 cm × 32 cm × 83 cm |
Three Riding Modes: Ride Your Way
One of the best things about the K8 is flexibility. It offers three distinct riding modes:
1. Pure Electric
Twist the throttle and let the 500W motor do all the work. Perfect for commuting when you don’t want to break a sweat — or for climbing hills after a long day.
2. Electric Power Assistance
Pedal and the motor assists you. This is the most efficient mode for maximizing your 30–40 km range, and it feels natural thanks to the integrated 12-magnet speed sensor.
3. Human Powered Cycling
Turn the motor off and ride the K8 like a regular bicycle. Great for fitness, or for extending battery life on long trips.
Who Is the K8 Fat Tire E-Bike For?
The K8 is a great fit for:
- 🏙️ City commuters who want a comfortable, upright ride
- ❄️ Winter riders dealing with snow and slush
- 🏖️ Beach and trail riders who need fat tire traction
- 🧓 Older riders who prefer a step-through frame
- 📦 Riders carrying cargo — up to 150 kg load capacity
- 🎨 Anyone who wants a custom-colored e-bike
If you’ve been put off by tall, awkward e-bike frames, the K8’s step-through design solves that problem immediately.
How Far Can You Go? Understanding the 30–40 km Range
The K8’s 48V 10.4Ah lithium battery delivers a range of 30–40 km per charge. Actual range depends on:
- Riding mode — pure electric drains faster; pedal-assist extends range
- Terrain — hills and soft sand use more power
- Rider + cargo weight — heavier loads reduce range
- Temperature — cold weather reduces battery efficiency
- Tire pressure — properly inflated fat tires roll more efficiently
Tip: For the longest range, use pedal-assist mode, keep tires inflated to the recommended pressure, and store your battery indoors in cold weather.
Speed: What to Expect
The K8 has a speed range of 25–50 km/h, depending on mode and settings.
⚠️ Important: E-bike speed limits vary by country and region. In many places, street-legal e-bikes are capped at 25 km/h (EU) or 20 mph (US). Always check your local regulations before riding at higher speeds on public roads.
We have many different options for upgrading the ebikes
- Upgrade 48V15A with a range of 50 kilometers
- Upgrade 48V20A with a range of 60 kilometers
- Upgrade 48V25A with a range of 70 kilometers
- Upgrade 48V30A with a range of 80 kilometers
- Upgrade 48V40A with a range of 100 kilometers
- Upgrade 48V50A with a range of 100 kilometers
- Upgrade 48V60A with a range of 120 kilometers
- Upgrade hydraulic oil brake
- Upgrade 750W motor
- Upgrade 1000W motor
- Upgrade 1500W motor
- Upgrade 500W dual motors
- Upgrade 750W dual motors
- Upgrade 1000W dual motors
- Upgrade 1500W dual motors
- Upgrade to Kenda tires
Custom Colors: Make It Yours
One of the standout features of the K8 is color customization. Whether you want a classic matte black, a bold red, or a custom branded color for your fleet, the K8 can be ordered in the color you want.
This makes it especially appealing for:
- Retail customers who want a unique ride
- Rental fleets wanting brand consistency
- Dealers and wholesalers ordering in bulk
Wholesale & OEM Orders
BSOCool welcomes wholesale and OEM orders for the K8 fat tire e-bike. Container loading:
| Container | Quantity | Volume |
|---|---|---|
| 20″ | 70 pcs | 28 CBM |
| 40 HQ | 170 pcs | 68 CBM |
Custom colors, logo branding, and packaging options are available. Contact us for FOB pricing and lead times.
Take a ride and wAnder through the woods
Frequently Asked Questions
Q: What is the range of the K8 e-bike?
A: 30–40 km per charge, depending on riding mode, terrain, and load.
Q: Can I customize the color?
A: Yes — color customization is supported. Contact us for available options.
Q: What is the top speed?
A: 25–50 km/h, depending on mode and local regulations.
Q: How long does charging take?
A: Approximately 4–6 hours with the included 54.6VDC certified charger.
Q: What is the maximum load capacity?
A: 150 kg.
Q: Is the K8 waterproof?
A: The instrument and main line are IP68 waterproof. Avoid deep water and prolonged heavy rain exposure.
Q: Is assembly required?
A: The K8 ships mostly assembled. Basic final assembly (handlebar, pedals, front wheel if applicable) is typically required.
Q: Do you offer wholesale pricing?
A: Yes. We welcome wholesale and OEM orders. Contact us for details.
Is the K8 Right for You?
If you want an e-bike that’s easy to mount, stable on any surface, and built to handle everything from city commutes to snowy trails, the K8 20″ step-through fat tire electric bike is a strong choice.
With a 500W motor, 48V 10.4Ah battery, Shimano 7-speed drivetrain, IP68 waterproof display, and 150kg load capacity — plus custom color options — it’s a versatile, well-equipped ride at a competitive price point.
👉 Ready to ride? View the K8 product page or contact us for pricing, custom colors, and wholesale inquiries.