Swytch eBike Kit for Bromptons


Swytch eBike Kit for Bromptons


Convert ANY Brompton into an eBike

  • Compatible with any Brompton
  • 25/30kph max speed
  • Up to 50km range
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Swytch eBike Kit Details

Convert your Brompton bike into an eBike with the smallest and lightest eBike conversion kit in the world. It’s easy to install and compatible with all Brompton models.

High-Torque Brushless Motor

Producing up to 40 Nm of torque, our hub motor helps you effortlessly climb hills and shorten journeys. The motor can assist an average adult up a steep 30% incline with ease. Coupled with our finely tuned controller algorithm, the silent Swytch motor has no drag – even when turned off.


Lithium-Ion Power Pack

There are two types of Power Pack, the ECO and the PRO. Their sleek and lightweight design can deliver up to 50 km of range as well as fast-charging in 2 hours. These compact Power Packs can be easily removed from your Brompton’s handlebar or luggage mount for storage and safety.

Drive Type

Front hub frictionless geared motor

Fork Dropout Width

74-80mm (fits Brompton and other folding bicycles with narrow forks e.g. Dahon)

Top Speed

30km/h (restricted to 25km/h in the UK, EU, and Australia with the ability to derestrict for off-road use)



Brake Compatibility

Rim brake

Gear Compatibility

All gear types, including derailleur and hub gears

Added Weight

1.5kg Power Pack and 1.5kg motor


Silver or black 28x12g spokes


Silver or black doubled walled from PowerRim

ECO & PRO Dimensions


PRO Power Pack

ECO Power Pack

Motor Specs

PRO Power Pack

ECO Power Pack

250W Brushless DC geared motor
(40Nm torque)

250W Brushless DC geared motor
(40Nm torque)

Battery Capacity

PRO Power Pack

ECO Power Pack

250Wh (36V 7Ah)

180Wh (36V 5Ah)


PRO Power Pack

ECO Power Pack

50km at 125W average power output

35km at 125W average power output

Top Speed

PRO Power Pack

ECO Power Pack

30km/h (derestricted)


Max Current

PRO Power Pack

ECO Power Pack



Battery Cells

PRO Power Pack

ECO Power Pack

Lithium Ion 18650 3500MAh cells

Lithium Ion 18650 2500MAh cells

Battery Lifespan

PRO Power Pack

ECO Power Pack

1000 cycles before significant capacity reduction

800 cycles before significant capacity reduction


PRO Power Pack

ECO Power Pack

36V 6MOSFET sine wave 15A controller

36V 6MOSFET square wave 15A controller


PRO Power Pack

ECO Power Pack

2A 36V charger (included) - 4-hour charge time
3A 36V charger (optional) – 3-hour charge time

2A 36V charger (included) - 3-hour charge time
3A 36V charger (optional) – 2-hour charge time

Front Light

PRO Power Pack

ECO Power Pack

Integrated front light, 200 lumens


Custom-built motor wheel

We custom build the motor wheel for your bike. If you have a Brompton you will just need to confirm you need a 16″ Brompton wheel. If you have a different folding bike e.g. Dahon, with narrow forks, then you’ll need to specify your wheel size. After you have placed your order, you can confirm this in our order customisation portal.


Matte-black finish

We offer a matte-black wheel in our order portal as an optional upgrade for an additional charge. The regular Swytch wheel comes with a silver motor, rims and spokes.


  • Twist Throttle: The twist throttle sits on your handlebars and you twist it to supply power to the motor.
  • Thumb Throttle: Ideal for handlebars with little space, you can use the spring-loaded thumb lever by pressing it to power the motor wheel.

Brake sensors

Available for both cable and hydraulic brakes, these work by stopping the power to the motor as soon as you brake, even if you are still pedalling. They are great for adventure cyclists, commuting or if you often cycle through slow-moving traffic.

Spare Power Pack

Increase your range by 50 km by ordering a spare PRO Power Pack to carry with you, weighing only 2kg.


  • <br> Front Motor Wheel

    Front Motor Wheel

  • <br> Power Pack

    Power Pack

  • Quick Connect <br> Handlebar Bracket

    Quick Connect
    Handlebar Bracket

  • <br> Brompton PAS kit

    Brompton PAS kit

In the box you will find a custom made motor wheel, a Power Pack (containing the battery and controller), a quick connect handlebar bracket, a cadence-sensing Brompton PAS kit, a charger and an instruction manual. And that’s all you need to convert your Brompton into an eBike.

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We ship to the UK, EU, AUS, CAN and the US. We can also ship to the rest of the world but significant additional charges for air-freight will apply.
We are now completely sold out of kits at 50% off. Sign up to our waitlist to be invited to pre-order during our next launch window, which will be going live shortly. If you wish to buy a kit at full RRP, for same-week delivery, please contact us here.
No, our system doesn’t offer regenerative braking. This is because when you are cycling, approximately 95% of your energy is lost to air resistance and rolling resistance, so by adding regenerative braking the increased range would be minimal.

Instead, we developed a geared brushless motor that produces zero drag, so with the Power Pack removed, you can use your bike like normal. With regenerative braking the motor would always be dragging against your pedalling, even when off.
No. Using our smooth and frictionless geared brushless motor you can still cycle as normal with the Power Pack removed.
The motor wheel weighs 1.5kg, and the Power Pack weighs 2kg.