Brompton eBike Conversion Kit


Convert ANY Brompton into an eBike

  • Disc brake compatible
  • 25/30kph top speed
  • Up to 50km range
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New stock coming soon

Product Details

Convert ANY Brompton into an eBike with the world’s smallest and lightest eBike conversion kit. Easy to install on all Brompton models.

High-Torque Brushless Motor

Producing up to 40Nm of torque, the Swytch hub motor flattens hills and shortens journeys with ease. Our compact, brushless motor has enough pulling power to assist the average adult up a steep 30% incline smoothly and quietly, thanks to our tuned controller algorithm.


Lithium-Ion Power Pack

The Power Pack is the core of the Swytch kit, containing the controller and battery in a compact, sleek design that fits in the palm of your hand. Although small, it packs a punch, delivering up to 50km of range with average use and fast-recharging in just 2 hours.

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

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 capacity reduction

800 cycles before 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, 500 lumens


Custom-built motor wheel

We build the wheel to fit your Brompton. Simply confirm your wheel size after you order via our order customisation portal, and we do the rest.


Matte-black finish

Our regular wheels come with silver motors, rims and spokes as standard. If you’re looking to adjust the wheel colour to matte-black to match your bike (or just because it looks great), we offer this as an affordable customisation option to set your kit apart from the rest.


  • Twist Throttle: Fits to your handlebars and provides on-demand power at the twist of your wrist.
  • Thumb Throttle: Provides on-demand power using a spring-loaded thumb-lever. Recommended for handlebars with limited space.

Brake sensors

Available for both wired and hydraulic brake systems, this accessory cuts power to the motor when you brake – even if you are pedalling

Spare Power Pack

Increase your range by 50km with a spare PRO Power Pack to carry with you, weighing in at only 1.5kg.


  • <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

The Swytch Kit includes everything you need to convert your Brompton. It includes a motor wheel that we build to fit your Brompton. The Power Pack contains the battery, controller, and electronics. You also get the quick connect handlebar bracket, our cadence-sensing Brompton PAS kit, charger, and an instruction manual. That’s all you need, because the Swytch Kit is just that simple!

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Learn More


Riding a Swytch Bike couldn’t be easier. The pedal sensor measures how fast you are pedalling, then the Power Pack calculates the optimum power to deliver to the motor in the front wheel. As soon as you stop pedalling, the Power Pack cuts power to the motor.

The Swytch Kit is easy to fit, no specialist tools are required. Just swap your old wheel for the Swytch motor wheel, fit the pedal sensor, and put the quick connect bracket on the handlebars (it fits ANY handlebars). Finally, click on the Power Pack and you’re good to go!

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  • No-questions-asked, full service for the first year.
  • Quick dispatch of replacement parts, or collection for repair, if anything goes wrong.
  • Unlimited, free video calls with our qualified engineers based in London
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*All customers must fill out our warranty activation form by submitting photos of their installed kit. This allows our technicians to check that the kit is correctly installed, activating your 1 year warranty and ensuring you have the best possible riding experience.

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  • No customer is ever left behind. Once you become a Swytch customer, you will receive lifetime support and access to our latest products at a significant discount.
  • Even after your warranty expires, we will continue to support you with cost price replacement parts and free technical support.
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*All customers must fill out our warranty activation form by submitting photos of their installed kit. This allows our technicians to check that the kit is correctly installed, activating your 1 year warranty and ensuring you have the best possible riding experience.


The Swytch Kit ships to the UK, EU and USA with very competitive shipping rates via next-day couriers like DPD or Fedex. We can also ship to the rest of world but significant additional charges for air-freight will apply.
We are now completely sold out of kits for our current batch of production, which is on track for shipping in March. Sign up to the waitlist to be among the first to be invited to pre-order for our next production run, which will launch in early 2021.
Our system doesn’t offer regenerative braking, because for cycling it’s pointless. When 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 use a geared brushless motor that has zero drag so that you can still ride your bike like a regular bike even with the power pack off. If we added regen braking then the motor would always be dragging against your pedalling even with the power off.
We use a silent, smooth and frictionless geared brushless motor. So with the power pack removed you can still cycle like normal.
The motor weighs 1.5kg, and the power pack weighs 1.5kg, so the added weight is just 3kg!

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