Is the Koolux BK10S Fat Tyre Electric Bike easy to assemble?

The Koolux BK10S Fat Tyre Electric Bike arrives mostly assembled. Final setup normally includes aligning and securing the handlebars, fitting the pedals and completing essential safety checks. Allow approximately 20–30 minutes, or select our professional assembly and PDI service.

Is the Koolux BK10S water resistant?

The Koolux BK10S is not fully waterproof. Avoid prolonged exposure to heavy rain, and never submerge or pressure wash the bike or its electrical components. After riding in wet conditions, wipe the bike dry and store it in a dry, sheltered location.

Is the Koolux BK10S Fat Tyre Electric Bike road legal?

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.

Koolux BK10S Fat Tyre Electric Bike 48V 13Ah Koolux

Brand:

Koolux BK10S Fat Tyre Electric Bike

Motor

250W,500W

Battery

48V 13AH

Speed

15.5 MPH

Range

40 MILES

£999.00 £709.99

In stock 12 sold this week

Klarna £236.66 ×3

Clearpay £177.50 ×4

Pay monthly from £59.17/mo 6–12 months at checkout

Options shown at checkout. 18+ only. Subject to status & approval. T&Cs apply.

Complete your ride Save 15%

Add recommended accessories before checkout.

Six Peaks Adult Cycling Helmet

£16.99 £19.99

Six Peaks™ Strong Cycling D-Lock

£18.69 £21.99

Bike Assembly & 36 Point PDI Check

5-7 Working Days Delivery Optional

£99.99 £129.00

Product variants:

Home Delivery Tracked options shown at checkout

Delivery options

Choose your delivery option at checkout. Availability may vary by product, stock location and postcode.

Standard Home Delivery 3–5 working days

Our standard tracked home delivery service for most UK mainland orders.

Next Day Delivery Selected items

Available at checkout on selected in-stock items only. If Next Day Delivery is available for your order, it will appear before payment.

Trusted delivery partners

Tracking details are sent once your order has been dispatched
Some large, heavy or specialist items may arrive with a dedicated courier
Remote areas, Highlands, islands and non-mainland postcodes may require extra time or a delivery surcharge

Returns

30-day returns on unused items
Used items cannot be returned for change of mind

Click & Collect View collection options

Collection options

Collection timing depends on whether the product is already held at our Nuneaton workshop. You can contact us before ordering to check, or we will confirm the collection estimate after your order is placed.

In stock at Nuneaton Same or next day

If the product is already at the workshop, collection is usually available the same day or next day. We will contact you as soon as it is ready.

Transfer to Nuneaton workshop 5–7 working days

If the product is held at our main warehouse, allow up to 5–7 working days for it to be transferred to the workshop.

Select Pickup in store at checkout
We will confirm your collection day after your order is placed
Please wait for our collection confirmation before travelling

Price Promise Found the same product for less?

Our Price Promise

Found the same product for less? Send us the live offer before ordering.

We price match genuine UK retailer offers before you order
The model, specification, colour, condition, stock status and delivery terms must match
Marketplace sellers, used products, finance-only pricing, private codes, clearance offers and obvious pricing errors may be excluded

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Payment Options at Checkout Flexible payment options from trusted providers

PayPal PAY IN 3

Pay in 3 with PayPal

3 monthly payments of £0.00

T&C's apply.

clearpay

Pay in 4 with Clearpay

4 interest free payments of £0.00

T&C's apply.

Klarna.

Pay in 3 with Klarna

3 monthly payments of £0.00

T&C's apply.

Pay Monthly

Payment Options at Checkout

From 3 to 12 months, product dependent

Options shown at checkout.

Pay monthly and split payment options are shown at checkout. Availability depends on order value, product, eligibility, provider checks and provider terms.

Warranty, Parts & Support Covered View warranty details

Warranty period

12 months against manufacturing defects.

What’s covered

Confirmed production faults affecting the original frame and factory-installed electrical or mechanical components.

Replacement parts

We sell replacement parts and accessories for many products. Contact us with the model and part required.

Description

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.

Specifications

Collection	Electric Bikes
Brand	Koolux
Bike Type	Fat Tyre, City & Commuter, Delivery & Cargo
Motor Power	250W
Battery	48V 13AH
Top Speed	15.5 MPH
Acceleration Method	Regular Pedalling + Pedal Assist + Throttle Acceleration
Max Range	40 Miles
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
Dimensions
Built Dimensions	165 × 58 × 116 cm (L × W × H)
Box Dimensions	143 × 30 × 70 cm (L × W × H)

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.