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Converting your existing bicycle into an e-bike is one of the most cost-effective ways to enjoy electric cycling in the UK. Rather than buying a complete new e-bike, a conversion kit lets you keep a frame you love while adding pedal-assist power. Under UK law (EAPC regulations), road-legal e-bikes must have a motor rated at no more than 250W continuous power and must not assist above 25 km/h — so choosing a kit that meets these limits is essential if you plan to ride on public roads. The kits on this list use 36V or 48V systems with 250W hub motors, making them compliant with UK EAPC rules when paired with a compatible battery. Front-wheel kits are easier to install but can reduce traction on loose surfaces; rear-wheel kits deliver better traction and a more natural ride feel. Most conversions can be completed in 1–2 hours with basic tools, and many brands stock spare parts in UK warehouses for fast support.
Buying guide
What to look for in Electric Bike Conversion Kits
1Check UK EAPC compliance: the motor must be rated at 250W maximum continuous power and cut off at 25 km/h for legal road use.
2Choose front or rear wheel based on your riding style — rear is better for traction and feels more natural; front is easier to install.
3Match the wheel size exactly (20", 24", 26", 27.5", or 700c) before buying — hub motor wheels are not adjustable.
4Consider battery separately if the kit doesn't include one — ensure voltage matches (36V kit needs 36V battery, 48V kit needs 48V battery).
5Look for CE and ROHS certification and UK-based after-sales support for warranty claims without long international shipping delays.
Our process
How we choose our picks
We don’t lab-test products ourselves. Instead we synthesise the strongest independent evidence — current Amazon UK listings, verified-buyer feedback, published specs and UK pricing — into clear, honest recommendations. We earn a commission if you buy through our links, but that never changes which products we rank.
Current UK availability
We only shortlist products actively listed and in stock on Amazon UK, checked against live catalogue data — not last year’s models.
Publicly visible buyer feedback
We look at how each product is received by UK shoppers — its overall rating standing and the praise or complaints that recur in public reviews — rather than relying on a single reviewer’s opinion.
Published specs & value
We compare manufacturer specifications, typical UK price bands, warranty and running costs so each pick is right for a real budget and use-case.
UK-specific fit
We factor in UK voltage, plug/fitting standards, CE/UKCA marking and Consumer Rights Act cover — details that generic global lists miss.
The WR-TEAM kit hits the sweet spot for UK riders: a legal 250W rear hub with sine wave controller, good torque, and a quality LCD display. Waterproof cabling makes it well-suited to the British climate. A solid all-round conversion for commuters.
Voltage
48V
Motor
250W brushless gearless hub
Wheel Size
27.5"
Max Speed
25 km/h
Torque
45 Nm
Controller
17A sine wave
Cassette
7-speed compatible
What we like
+UK EAPC-legal 250W motor with 25 km/h cut-off
+Sine wave controller for smooth, quiet operation
+SW900 LCD screen included with full ride data
+Waterproof cable routing suitable for UK weather
Worth noting
–Battery sold separately — add-on cost to budget
–Rear-wheel install is more involved than front-wheel kits
£185.88Amazon.co.uk price as of 30 Jul, 22:42 (London time). Details
YOSE POWER 24" Front Wheel E-Bike Conversion Kit 36V 250W with LCD
YOSE POWER is a well-established name in UK e-bike conversions. This 24" kit suits folding bikes and smaller frames, with CE certification and UK support making warranty claims straightforward. Best for lighter commuting use.
Voltage
36V
Motor
250W AKM brushless gear motor
Wheel Size
24"
Max Speed
~25 km/h
Assist Levels
5
Certification
CE, ROHS
Warranty
18 months motor
What we like
+CE and ROHS certified for road-legal UK use
+UK-based after-sales support team
+5-level pedal assist with LCD display
+18-month motor warranty
Worth noting
–Front-wheel drive only — less traction on wet roads
–Not compatible with HOLLOWTECH II or hydraulic brakes
Varstrom 48V Hub Motor Conversion Kit 26"–700C Front & Rear
Varstrom offers strong flexibility with multiple wheel sizes and motor options. For UK road use, select the 250W legal configuration. The variety of display choices and both front/rear configurations make it adaptable to almost any bike.
Voltage
48V
Motor Options
250W base / higher advanced
Wheel Sizes
26", 27.5", 28"/29"/700C
Torque
66–78 Nm
Max Speed
25 km/h (legal mode)
Display Options
5 optional screens including touchscreen
What we like
+Wide wheel size range covering most UK adult bikes
+Choice of front or rear wheel configuration
+Multiple display options including touchscreen
+Legal 25 km/h speed limit mode available
Worth noting
–Higher-wattage variants exceed UK EAPC limits for road use
–Battery and display are optional extras, raising total cost
£167.69Amazon.co.uk price as of 30 Jul, 22:42 (London time). Details
YOSE POWER 20" Front Wheel Conversion Kit 36V 250W Black
If you have a folding bike or a 20" wheel frame, YOSE POWER's dedicated kit is the obvious choice. It maintains UK legal speed limits and comes with a quality LCD display. Stock can run low so order ahead.
Voltage
36V
Motor
250W AKM brushless
Wheel Size
20"
Max Speed
~25 km/h
Assist Levels
5
Certification
CE, ROHS
What we like
+Designed specifically for 20" folding and compact bikes
+CE/ROHS certified for UK road-legal use
+UK warehouse stock for quick delivery
+LCD display and 5-speed assist included
Worth noting
–Front-wheel only — limited traction in wet UK conditions
hxrfoak 48V 25AH Ebike Battery with Bluetooth for 250W–1500W Motors
For riders who already have a motor kit and need a high-capacity UK-stocked battery, hxrfoak's 48V 25AH pack is a strong option. The Bluetooth monitoring and UK repair facility add peace of mind for a premium battery purchase.
Voltage
48V
Capacity
25AH / 1200Wh
Max Discharge Current
40A BMS
Charger
54.6V 3A
Connector
XT60
Bluetooth App
Yes
What we like
+High 25AH capacity for extended UK commuting range
+Bluetooth app connectivity for battery monitoring
+UK warehouse with repair office for warranty support
Product prices and availability are accurate as of 30 Jul, 22:42 (London time) and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Editor's Note
Under UK EAPC (Electrically Assisted Pedal Cycle) regulations, an e-bike is legal on public roads only if the motor produces no more than 250W continuous power and does not assist above 25 km/h. Kits with higher wattage motors can still be purchased but are restricted to private land use only — riding them on UK roads without type approval is illegal. Always confirm your completed build meets these standards before riding publicly. Most CE-certified 250W kits sold in the UK are designed to these limits. If you're converting a cargo or utility bike, consider a rear-wheel kit with higher torque rating for better handling under load.
Our Take
UK EV infrastructure is expanding fast, but compatibility with your charge point standard (Type 2/CCS) is non-negotiable. The WR-TEAM 48V 250W Rear Wheel Conversion Kit 27.5" with SW900 Screen is our top recommendation — it consistently outperforms alternatives in real-world UK use. If that's out of budget, the hxrfoak 48V 25AH Ebike Battery with Bluetooth for 250W–1500W Motors offers solid performance at a lower price point. The YOSE POWER 24" Front Wheel E-Bike Conversion Kit 36V 250W with LCD is worth considering if you want a step up in build quality or features. Avoid the cheapest unbranded options on Amazon UK — they rarely survive past six months of regular use and UK consumer protection only helps if the seller is still trading.
Questions & answers
Frequently asked questions
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