Is the Koolux BK10S waterproof?

The Koolux BK10S is water-resistant and suitable for riding in light to moderate rain. It is not fully waterproof and should not be submerged. Short term, your product can get a little wet and be in the rain, but any long-term exposure can cause serious problems.

Is the Koolux BK10S road legal in the UK?

Yes — this model is road legal in the UK. It’s classed as an EAPC (electric assist bicycle), so it can be ridden on public roads and cycle paths like a standard bike, without any issues from the police.

Does the Koolux BK10S come with a throttle?

Yes, it includes a thumb throttle for full-electric riding without the need for peddling.

How long does delivery take?

Free Delivery on all orders. Your product will be delivered within 3-5 days via Express Delivery. We use a panel of trusted couriers such as DPD, UPS, Fedex, DHL. Tracking information is provided upon dispatch.

What is your return policy?

We offer a 30-day return policy for unused items in their original packaging. Full details are available on our Returns page.

Can I track my order?

Once your order ships, you'll receive a tracking number via email. You can use this number to track your package on our website or the carrier's site.

Do you provide a warranty?

We are confident in the quality of E-Bikes and E-Scooters we offer here at Trail Surge. All Products come with a minimum 12 Month Manufacture Guarantee/Warranty for main components.

Koolux BK10S Fat Tyre Electric Bike 48V 13Ah Koolux

Koolux BK10S Fat Tyre Electric Bike

Name: Koolux BK10S Fat Tyre Electric Bike
Brand: Koolux
Price: 79695 GBP
Availability: InStock
Rating: 4.67 (3 reviews)

Motor

250W,500W

Battery

48V 13AH

Speed

25 KM/H

Range

64 KM

€1.171,95 €796,95

In stock 1 sold this week

Free UK Delivery

Delivery By: 3–5 working days

1-Year Warranty

Manufacturer-backed cover

EU Support Team

Quick help & support.

Official Koolux

Genuine brand new stock

Product variants:

Koolux BK10S Key Features

Quick Summary
The KOOLUX BK10S combines legal-class performance with portability. With its 250 W motor, 48 V battery, fat tyres, and foldable frame, it's ideal for commuting and light off‑road adventures.

Power & Range
The 250 W motor with ~60 Nm torque gives solid hill climbing and smooth acceleration. The battery supports up to approximately 90 km per charge in assist modes.

Comfort & Safety
Ride smoothly on fat tyres and front suspension. Hydraulic disc brakes offer reliable stopping—even in wet conditions.

Smart Design Features
Folds compactly for easy storage or transport. The display shows speed, battery level, and assist mode. Battery is easily removable and lockable.

Built for Everyday Use
Equipped with front/rear LED lights, mudguards, Shimano 7-speed gearing, and a stable, lightweight frame. Ready for daily commuting or weekend outings.

Koolux BK10S Specifications

Brand	Koolux
Bike Type	Fat Tyre, City & Commuter, Delivery & Cargo
Motor Power	250W
Battery	48V 13AH
Top Speed	15.5 MPH
Acceleration Method	Regular Pedaling + Pedal Assist + Throttle Acceleration
Maximum Range	40 Miles
Max Rider Height
Charging Time	7+ Hours
Shock Absorbers	Front
Wheel Size	20inch x 4.0 Fat Tyre
Brakes	Dual Mechanical Disc Brakes
Gears	7 Speed Shimano Gears
Bike Weight	27KG
Max Climb	15 degrees
Max Rider Weight	120KG

Download the Official Koolux App

Download Product Manual (PDF) Awaiting Upload

Watch Assembly Video Awaiting Upload

Power & Range
The 250 W motor with ~60 Nm torque gives solid hill climbing and smooth acceleration. The battery supports up to approximately 90 km per charge in assist modes.

Comfort & Safety
Ride smoothly on fat tyres and front suspension. Hydraulic disc brakes offer reliable stopping—even in wet conditions.

Smart Design Features
Folds compactly for easy storage or transport. The display shows speed, battery level, and assist mode. Battery is easily removable and lockable.

Built for Everyday Use
Equipped with front/rear LED lights, mudguards, Shimano 7-speed gearing, and a stable, lightweight frame. Ready for daily commuting or weekend outings.

A man rides a white electric bike on a paved path through a park. Tall buildings are visible in the background. Text on the image highlights the bike’s adjustable speed settings up to 45 km/h and compliance with regulations.

48V 13Ah Lithium Battery – Long Range & Secure

This high‑capacity 48 V 13 Ah lithium battery delivers an impressive range of 35‑90 km, giving you the freedom to ride further. The detachable battery compartment includes a safety lock so you can remove it for charging without worry.

A graphic of an electric bike’s battery shows its internal cells glowing green. Text highlights features: 48V/13Ah capacity, 5–7h charging time, 25–35KM range per charge, and Li-ion battery with a “Smart Chip.”.

Removable 48V 12Ah Battery – Fast Charge & High Capacity

With a removable 48 V 12 Ah battery rated at 576 Wh, you can enjoy long rides and quick recharging. The 4 A fast‑charging system powers up in hours and ensures a maximum range of around 70 km.

High‑Pressure Suspension Fork – Smooth Ride

A built‑in high‑strength steel shock absorber provides excellent cushioning and lubrication. The high‑pressure suspension fork smooths out bumps and potholes, giving you more control and comfort.