How fast can the Koolux X12 Electric Bike go?

The listed top speed is 28 MPH. Real-world speed varies with rider weight, terrain, battery level and which speed/assist mode you’re using.

Is the Koolux X12 Electric Bike road legal in the UK?

Many e-bikes are supplied with a UK-compliant assist setting (25 km/h / 15.5 mph). If you use higher-speed or higher-power modes on public roads, it may be treated as a motor vehicle and need registration, tax and insurance. Always ride to the current rules.

Le Site Est-Il Étanche ?

Le Site Est Résistant À L'Eau, Selon La Norme Ip65, Mais Il N'Est Pas Étanche. À Court Terme, Votre Vélo Électrique Peut Être Mouillé Et Sous La Pluie, Mais Toute Exposition À Long Terme Peut Causer De Graves Problèmes...

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 X12 Electric Bike

Name: Koolux X12 Electric Bike
Brand: KOOLUX
SKU: KOOLUX-X12-GRAY
Price: 1.17395 GBP
Availability: OutOfStock
Rating: 4.75 (4 reviews)

Motor

500W

Battery

Speed

45 KM/H

Range

55–121 KM

€1.290,95 €1.173,95

Sold out

Free EU Delivery

Delivery By: 5–10 working days

1-Year Warranty

Manufacturer-backed cover

EU Support Team

Quick help & support.

Official KOOLUX

Genuine brand new stock

Variantes du produit:

Koolux X12 Key Features

Powerful 500W brushless rear motor for Confident Riding
The KOOLUX X12 features a high-efficiency 500W brushless rear motor, delivering smooth acceleration and reliable torque for hills, city riding, and mixed terrain.

Long-Range Lithium-ion battery for Everyday Adventures
Designed to go the distance, the battery system provides a real-world range of up to 55–120 km depending on riding mode, terrain, and rider weight.

Comfort-Focused Design for Stability and Control
Wide tyres and a well-balanced frame help absorb road vibrations and uneven surfaces, keeping rides comfortable and confidence-inspiring.

Smart Display and Assist System
Ride with full control using a clear digital display showing speed, battery level, and distance. Multiple pedal-assist levels help tailor power delivery to your riding style.

Road-Legal Configuration
Supplied in a 25 km/h (road legal setting) configuration for UK compliance. Always follow local e-bike regulations.

Koolux X12 Specifications

Motor Power	500W
Top Speed	28 MPH
Max Range	34-75 Miles

Wheel Size	20*4.0 inch
Collection	Electric Bikes With Throttles

Product Manual & Assembly

Download Product Manual (PDF) Awaiting Upload

Watch Assembly Video Awaiting Upload

Qu'Est-Ce Qui Est Inclus ?

1X (En Grande Partie Construit)

1X Chargeur

1X Outils D'Assemblage

1X Manuel D'Utilisation De L'Assemblage

Happy with it

Got this as a replacement for an older model and it feels like a step up. Pedal assist comes in smoothly and doesn't feel jerky. Feels planted and stable once you're up to speed. Handles nicely and feels stable once you’re moving. Happy we went for it.

Happy with it

Really pleased with it overall. Hills are noticeably easier with assist on the higher levels. Pedal assist comes in smoothly and doesn't feel jerky. Handles nicely and feels stable once you’re moving. Exactly what we needed.

Thanks for your review — glad you’re enjoying it!

Comfortable

After a couple of weeks using it, I'm impressed. Controls are simple and the display is easy to read. Pedal assist comes in smoothly and doesn't feel jerky. Handles nicely and feels stable once you’re moving. Feels well made.