Brompton eBike Conversion Kit

Convert ANY Brompton into an eBike with the World’s Smallest and Lightest Brompton eBike Conversion Kit.

Brompton compatible
Easy to install
Up to 30 mile range

Signup for 50% off

Brompton eBike Conversion Kit


Convert ANY Brompton into an eBike with the World’s Smallest and Lightest Brompton eBike Conversion Kit.

Brompton compatible
Easy to install
Up to 30 mile range

Signup for 50% off

SKU: KIT-BRO- Category:
As featured on Channel 5 and BBC News

Compact High-Torque Motor

Conquer any hill with the high torque Swytch eBike Kit brushless hub motor. Rated for 40Nm, this compact brushless motor has enough pulling power to drag the average adult up a 30% incline with only some light pedalling.

Lithium-Ion Power Pack

It may be small and lightweight but it packs a punch. The Swytch power pack is equipped with up to a 250Wh lithium-ion cell battery connected to a sine wave brushless motor controller. It will last you up to 30miles/50km on one charge, and charges in as little as 3 hours.

Dual Mounting Options

With the Swytch Brompton eBike Kit, you have two mounting options. Fit the power pack to the handlebars so you can still use the luggage block, or fit it to the luggage block so you can leave it on when you fold.

How it works

Riding a Swytch Bike couldn’t be easier. As you pedal, the sensor detects your pedalling and sends a signal to the power pack. The power pack calculates the optimum power required, and delivers it to the front wheel motor.

What’s in the box

The Swytch Kit includes absolutely everything you need to convert your bike. It includes a complete motor wheel in any size, built to order. The power pack contains the battery, controller, and electronics. You also get the handlebar connector, the pedal sensor, battery charger, and an instructions manual. That’s all you need, because the Swytch kit is just that simple!

1. Motor Wheel

Complete wheel with spokes, rim and tape

16″ Brompton Wheel Size as Standard

Geared brushless motor with zero drag

Narrow width to fit easily into Brompton forks

Available in black or silver

2. Power Pack

All in one, instantly removable

Lithium-Ion Battery up to 7Ah 40 Miles range

Brushless motor controller

LED display with 5 power levels

3. Handlebar Connector

Patented universal design

Fits easily to any handlebars

Integrated electrical connections

Instant connectivity

4. Pedal Sensor

2-part clip on magnet disc

Stick-on Hall effect cadence sensor

Robust waterproof design

12 magnet system for smooth riding

5. Charger

2A charger (included): 3-4 hour charge time

3A fast charger (extra): 2-3 hour charge time

UK / EU / USA plug compatible

UK / EU / USA safety certified

6. Support & Community

1 year included warranty

Free unlimited video call support

Online walk-throughs and how-to videos

Swytch forums and discussion


The Swytch Kit is easy to fit, no specialist tools are required. Just take off your old wheel and replace it with the new Swytch motor wheel. Then fit the pedal sensor by the pedals, and put the connector onto the handlebars (it fits to ANY handlebars). Then, simply click on the power pack and you’re good to go!

How to Fit

The Swytch kit is the easiest conversion kit on the planet to fit.

Simply remove your regular wheel, and replace it with the Swytch motor wheel.

Then fit the pedal sensor and connector bracket, connect it all together, and you’re good to go! You can Swytch instantly between bike and eBike thanks to the patented quick-connect bracket mechanism and removable lightweight power pack.

Full Instructions Video

Mechanical Specs

Drive Type Front hub geared motor
Dropout Width 74mm (suitable for Brompton and Dahon forks)
Gear compatibility Compatible with any type of gearing, including derailleur and hub gears.
Torque 40Nm
Top Speed Limited to 15MPH
(can be de-limited to approx 18MPH)
Added weight 3kg
Brake Rim or Disc brake compatible (motor is equipped with a mount for screwing on the disc-brake disc to it)
Spokes 28x 12g silver spokes
Rim Silver, double walled from PowerRim

Electrical Specs

Motor specs 250W Brushless DC geared motor (40Nm torque)
Battery Capacity PRO Power Pack
36V 7Ah = 250Wh
Expected range 30miles/50km at 125W average power output.
ECO Power Pack
36V 5Ah = 180Wh
Expected range 20miles/35km at 125W average power output.
Controller ECO POWER PACK: 36V 6MOSFET Square Wave 15A controller

PRO POWER PACK: 36V 6MOSFET Sine Wave 15A controller

Battery Tech PRO Power Pack – Lithium Ion 18650  3500MAh cells
ECO Power Pack – Lithium Ion 18650  2500MAh cells
800-1,000 expected cycles before capacity reduction
Charger 2A 36V charger (included): 3 hour charge time (4 hours for PRO Power Pack)
3A 36V fast charger (extra): 2 hour charge time (3 hours for PRO Power Pack)
Front Light PRO Power Pack – Integrated front light, 500 lumens
ECO Power Pack – None


Where do you ship to?

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.

Is it available now?

We are now completely sold out of kits for our current batch of production, which is on track for shipping in November/December. Sign up to get notified when our pre-orders re-open for our next production run, scheduled for delivery in early 2021.

Does it recharge as you pedal?

Our system doesn’t offer regenerative braking, because for cycling it’s pointless. 80% of the energy is used to push air out the way, so by adding regen 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.

Is there any drag?

We use a silent, smooth and frictionless geared brushless motor. So with the power pack removed you can still cycle like normal

How much does it weigh?

The motor weighs 1.5kg, and the power pack weighs 1.5kg, so the added weight is just 3kg!

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