Brompton Electric Bike Conversion Kit

Convert ANY bike into an electric bike with one of the world’s smallest and lightest Brompton electric bike conversion kits.

Brompton Compatible
Easy to Install
Up to 50km Range

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Brompton Electric Bike Conversion Kit

£499.00£599.00

Convert ANY bike into an electric bike with one of the world’s smallest and lightest Brompton electric bike conversion kits.

Brompton Compatible
Easy to Install
Up to 50km Range

New stock available to pre-order soon with 50% discount. Sign up to avoid missing out.

Sign up for 50% OFF

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SKU: KIT-BRO- Category:

High Torque Brushless Motor

Conquer any hill with the high torque Swytch hub motor.

Rated for 40Nm it has enough pulling power to drag the average adult up a 30% incline without pedalling.

Lithium-Ion Power Pack

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

Dual Mounting Options

Fit to the handlebars so you can still use the luggage block

Or fit to the luggage block so you can leave it on when you fold.

How it works

As you pedal, the sensor detects your pedaling and sends the signal to the power pack. The power pack calculates the optimum power required, and delivers it to the motor in the front wheel.

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 battery is included inside the power pack, which also contains the 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

3 hour charge time

2A Charger

UK / EU / USA plug compatible

Safety certified in USA and EU

6 Support & Community

 

Free video call support

Online walk-throughs and how-to videos

Swytch forums and discussion

Rewards for “Super Backer” customers

Installation

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!

Installation typically takes 10 minutes and then 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 TypeFront hub geared motor
Dropout Width74mm (suitable for Brompton and Dahon forks)
Gear compatibilityCompatible with any type of gearing, including derailleur and hub gears.
Torque40Nm
Top SpeedLimited to 15MPH
(can be de-limited to approx 18MPH)
Added weight3kg
BrakeRim or Disc brake compatible (motor is equipped with a mount for screwing on the disc-brake disc to it)
Spokes28x 12g silver spokes
RimSilver, double walled from PowerRim

 

Electrical Specs

Motor specs250W Brushless DC geared motor (40Nm torque)
Battery Capacity[35Km kit]

36V 5Ah = 180Wh

Expected range 35Km at 125W average power output. 10-15 miles at constant maximum power 250W.

50 Km kit

36V 7Ah = 250Wh

Expected range 50 miles at 125W average power output. 20-25 miles at constant maximum power 250W.

Controller36V 6MOSFET Sine Wave 15A controller
Battery Tech[35 Km version] Lithium Ion 18650  2500MAh cells

[50 Km version] Lithium Ion 18650  3500MAh cells

800-1,000 expected cycles before capacity reduction

Charger2A 36V charger with USA plug 3-4 hour charge time (4-5 hours for 50 mile battery)
Front LightIntegrated front light, 500 lumens [50Km kit only]

FAQs

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 March. Pre-orders will re-open next month for our next production run for delivery in May/June.

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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