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Swytch · Hub motor
Swytch AIR Pro
4.5
Featherweight front-hub kit with a handlebar battery. Easiest fit of anything we tested.
£699 – £899Read Review
Conversion kit reviews · 2026
Turn the bike you already own electric — without buying a new e-bike.
A decent e-bike costs £1,800 and up. A good conversion kit starts around £300 and bolts onto the frame you already trust. We test and rate hub-motor and mid-drive kits so commuters, cargo riders and weekend tourers can pick the right one first time — and stay inside UK and EU wattage limits while doing it.
Reviewed conversion kits
Six kits, tested on commuter, hybrid and cargo frames.
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Bafang · Mid-drive
Bafang BBS02B
4.7
The default mid-drive conversion. Huge torque, big aftermarket, needs a legal-limit tune for UK roads.
£420 – £650Read Review
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TongSheng · Mid-drive
TongSheng TSDZ2B
4.2
Torque-sensing mid-drive that rides far more like a factory e-bike than its price suggests.
£380 – £520Read Review
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Voilamart · Hub motor
Voilamart 1000W Rear Kit
3.8
Budget rear-hub power for off-road and private-land use. Loud value, rough edges.
£220 – £330Read Review
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Cytronex · Hub motor
Cytronex C1
4.4
British-built, bottle-battery kit aimed at road bikes where weight matters more than torque.
£950 – £1,150Read Review
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Yose Power · Hub motor
Yose Power Rear Wheel Kit
4.0
Sensible legal-limit rear-hub bundle with a rack battery. A safe first conversion.
£300 – £480Read Review
Side-by-side comparison
Quick reference for power, price and our overall score.
| Product | Motor Power | Price | Rating |
|---|---|---|---|
| Swytch AIR ProHub motor | 250W | £699 – £899 | 4.5 |
| Bafang BBS02BMid-drive | 750W | £420 – £650 | 4.7 |
| TongSheng TSDZ2BMid-drive | 250W – 500W | £380 – £520 | 4.2 |
| Voilamart 1000W Rear KitHub motor | 1000W | £220 – £330 | 3.8 |
| Cytronex C1Hub motor | 250W | £950 – £1,150 | 4.4 |
| Yose Power Rear Wheel KitHub motor | 250W | £300 – £480 | 4.0 |