Is the Koolux X3 a true step-through electric bike?

Not fully. The X3's top tube dips lower than a traditional diamond frame, but it still crosses the centre of the bike. Riders wanting the clearest mounting space should look at the open low-step Koolux X2 instead.

What maintenance do the Koolux X3 hydraulic brakes need?

Check pad thickness, rotor condition and lever feel rather than adjusting a brake cable. A spongy lever, fluid leak, rubbing rotor or reduced braking needs attention; periodic bleeding requires the correct mineral oil or fluid specified for the fitted brake system, so use a technician if you are unsure.

Does the Koolux X3 fold or store like a compact e-bike?

No. It is a full-size bike approximately 185 cm long and 28.6 kg, without a central folding frame. Plan normal bicycle storage and measure narrow doors, lifts or wall racks before ordering.

What normally comes in the box with the Koolux X3?

The current manufacturer package list includes the bike, charger, throttle accessory, pump, lock, two keys and installation tools. Final assembly and safety checks are still required: align and secure the handlebars, fit any boxed components, set tyre pressures and verify gears and both brakes before the first ride.

Is the Koolux X3 Electric Bike 48V 15ah easy to assemble?

The Koolux X3 Electric Bike 48V 15ah 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 X3 Electric Bike 48V 15ah water resistant?

The Koolux X3 Electric Bike 48V 15ah 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.

Brand:

Certified

Koolux X3 Electric Bike 48V 15ah

Motor

500W

Battery

48V 15AH

Speed

15.5 MPH

Range

43 MILES

£1,199.00 £849.99

Sold out

Klarna £283.33 ×3

Clearpay £212.50 ×4

PayPal £283.33 ×3

Pay monthlyFlexible finance

12 months • 0%

12 months —/month Interest-free

Longer terms 15.9% APR

2 years —/mo

3 years —/mo

4 years —/mo

Estimated payments • Subject to approval • T&Cs apply

Product variants:

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Out of stock

This item is currently unavailable
Contact us for the latest restock estimate
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Click & Collect Collection from our Nuneaton workshop

Collect from our Nuneaton workshop

Collection is available by appointment from our Nuneaton workshop. The preparation time depends on where the product is currently stored. Contact us before ordering for the latest availability, or place your order and we will confirm when it is ready to collect.

Transfer required to Nuneaton Usually 5–7 working days

Products stored at another warehouse normally require 5–7 working days to reach our workshop. We will confirm as soon as the item is ready and arrange your collection appointment.

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Best Price Guaranteed

Seen the exact same product advertised for less? Send us the live offer before you order and we’ll check whether we can match it.

We consider genuine UK retailer offers for items that are in stock
The model, specification, colour, condition and delivery terms must be like-for-like
Marketplace or private sellers, used or clearance items, private codes, finance-only offers, bundle deals and obvious errors are excluded

Usually answered within 24 hours. Need a quicker answer? WhatsApp us or call 0800 099 6187.

Why Buy From TrailSurge? UK showroom, product support & aftercare

Buy your Koolux X3 Electric Bike 48V 15ah with UK-based support

TrailSurge is a UK retailer with a showroom and workshop in Nuneaton. Our team can help before you order and continue supporting you after your Koolux X3 Electric Bike 48V 15ah arrives.

UK-based customer support before and after your purchase
Showroom and workshop in Nuneaton
Help with product questions, setup, parts and aftercare
Tracked UK delivery with support if you need help with your order
Speak to a real member of our team before placing your order

Why buy through TrailSurge? For the best UK-based support and aftercare, we recommend buying through TrailSurge rather than ordering directly from overseas manufacturers or China-based sellers, where returns, warranty support and parts handling can be more difficult.

Need help with the Koolux X3 Electric Bike 48V 15ah? Ask our team a question before ordering.

WhatsApp Us Call Us 0800 099 6187

TrailSurge Warranty+ BEST WARRANTY IN THE UK Stronger cover. UK support. Real help when you need it.

TrailSurge Warranty+

Extra protection, backed by our UK team

For the first 12 months, TrailSurge Warranty+ gives you direct UK support on eligible faults affecting the main factory-fitted components — with practical help to get you back up and running.

UK-based fault support
Major factory-fitted components covered
Repair, parts or another suitable solution where eligible

Typical component cover: Eligible faults affecting the main factory-fitted electrical and mechanical components, as appropriate to your product.

Koolux manufacturer warranty

Warranty period: 12 months against manufacturing defects.
What’s covered: Confirmed production faults affecting the original frame and factory-installed electrical or mechanical components.

Road use notice: This bike is over 250W and is for private land/off-road use only. Need a UK road-compliant option? View road legal e-bikes .

Description

At the heart of the KOOLUX X3 lies a powerful 250W brushless hub motor with an impressive 500W peak capacity, offering smooth acceleration and confident performance. In restricted mode, the X3 complies with UK e-bike regulations at speeds of up to 15.5mph, while unlocked mode unleashes its full potential - reaching speeds of up to 28mph for private land use.

The neatly integrated yet removable 48V 15Ah lithium-ion battery ensures long-lasting power and convenient charging, making extended rides effortless.

Ride quality is enhanced by front fork suspension, 26" x 1.95" Kenda tyres for superior traction, and dual hydraulic disc brakes which deliver reliable stopping power in all conditions. Integrated LED front and rear lighting ensures excellent visibility, keeping you safe on early morning commutes and evening rides

You can choose between 3 driving modes: pedal assist mode, pure electric mode (if you use the throttle grip included as an accessory) and classic pedal mode. In normal pedal mode, you can experience unique acceleration with the 7-speed Shimano gears and mechanical gears. In moped mode and pure electric mode, you can enjoy an unexpectedly fast driving experience.

The e-bike represents a seamless fusion of innovative design and eco-friendly functionality, ideal for urban commuters and adventure seekers alike. Engineered with precision, this e-bike offers a sleek and modern aesthetic combined with robust performance features.

Specifications

Collection	Koolux Electric Bikes
Brand	Koolux
Bike Type	City & Commuter
Motor Power	500W
Battery	48V 15AH
Top Speed	15.5 MPH
Acceleration Method	Regular Pedalling + Pedal Assist + Throttle Acceleration
Max Range	43 Miles
Charging Time	7+ Hours

Shock Absorbers	Front
Wheel Size	26inch
Brakes	Dual Mechanical Disc Brakes
Gears	7 Speed Shimano Gears
Max Climb	15 degrees
Max Rider Weight	150KG
Dimensions
Built Dimensions	185 × 60 × 118 cm (L × W × H)
Box Dimensions	145 × 28 × 80 cm (L × W × H)