Everything you need to know about buying an electric folding bike

There’s nothing like taking two wheels out for a spin. Add some battery power and you’ll fly through the city like never before. Cycling is low-impact and a fantastic way to improve your physical and mental wellbeing. 

If you’re looking for a lightweight electric vehicle that takes you anywhere and goes everywhere, meet the Brompton Electric Folding Bike. The most compact folding ebike. Whether you want to make your commute more joyful, get back into cycling after a break or tackle steep hills, the Brompton Electric delivers the same original 3-part fold the Brompton is famous for with all the oomph and ease of an Electric boost.

Image of woman riding a Brompton Electric on a pavement

Power your ride when you need it, and stash it safely away indoors when you don’t.

When choosing the best folding ebike for you, there may be a few questions you have to find the electric bike that best suits your needs.

How do ebikes work?

An ebike, or electric bicycle, is a bicycle with a motor to give a boost when you need it.

The battery-powered motor provides electric pedal assistance, with different riding modes that can be set based on how much power you want to add to your ride. Different modes affect the battery charge - the higher the mode, the more power you use and the quicker the battery will deplete.

The Brompton Electric folding ebike has 4 powered modes:

  • Mode 0  - No powered assistance. The clutch disconnects automatically to allow the wheel to roll with minimal resistance. On Mode 0 the riding experience is just the same as riding a non-powered Brompton folding bike, and conserves the battery for the longest amount of time.

  • Mode 1 - Minimal electric motor assistance. The rider does most of the work - when pulling away from a red light or riding up hills, you get a short boost to get a move on. When riding steady, the bike gives a bit of an electric-powered tailwind.

  • Mode 2 - The recommended setting for most riders. Perfect for gentle hills, rolling terrain, light headwinds and stop-start traffic in the city. Get a strong boost when setting off.

  • Mode 3 - The most power. Fantastic for riding hilly terrain and taking on strong headwinds. Also perfect for those looking for a more leisurely ride on any terrain.

The pedal rotation sensor on the Brompton Electric folding bike features a smart torque sensor to measure the exact amount of pressure you put on the pedals. Offers smoother and more direct assistance to give a natural-feeling boost. The more you pedal, the more surge you feel from the support the Brompton Electric folding bike provides. Similarly, when you want to slow down, the sensor will adapt and lower the assistance provided by the motor. 

On a Brompton Electric, our lightweight folding electric bike has its rechargeable battery, user interface and luggage integrated into one piece and snaps onto the front frame of the bike with a simple click. Plug your smartphone into the battery’s USB port and charge as you ride.

The Brompton Electric battery can be fully charged in 4 hours.


What are the benefits of an ebike?

Perfect for…

  • Escaping the city and travelling further by bike

  • Saving time: with the same effort on a pedal bike, you’ll get to your destination faster than ever before

  • Urban exploring with a boost

  • Active transport: making your commute the most joyful part of your day 

  • Removing barriers: no need to avoid that pesky hill anymore - take it on with ease

  • Anyone looking to get back into cycling after a break or an injury 

  • Arriving at the office without the need for a shower!

Electric bicycles give you the opportunity to supercharge your ride and increase both physical and mental well-being. A study published in Transportation Research Interdisciplinary Perspectives revealed several interesting findings about ebike riders.

  • Those that ride ebikes are more likely to ride for longer than cyclists by taking longer trips on ebikes and bicycles.

  • The physical fitness benefits of active travel are similar in both cyclists and those that ride electric bikes.

Another study published in the Clinical Journal of Sport Medicine found the cardiovascular benefits of riding an ebike are the same as riding a regular bike.

By choosing active or multi-modal transport over a car, train or bus, you can increase your cardiovascular fitness and minimize your impact on the environment. 

Compact and easy to store, the Brompton Electric folding bike has all the benefits of an ebike, packed into the original 3-part fold. It takes around 20 seconds to transform your bike into a small compact package (585mm high x 565mm long x 270mm wide) that you can tow, stow and carry anywhere. Rush-hour trains, underground, overground, on boats or in car trunks. You can tuck away your Brompton Electric under your desk at work, in a cafe or safely at home - there’s no need to leave it outside.

Image of person holding the seat of a folded electric Brompton bike


What is the range of a folding ebike?

On a full charge, the Brompton Electric C Line can travel up to 15.5mph (25kmh) and has a range of 20 - 45 miles. Riding with the highest level of assistance (Mode 3) will have a range of approximately 20 miles before needing a charge. When riding with lower levels of assistance, you can ride up to 45 miles before needing a charge.

This may vary depending on rider weight and circumstances like terrain or wind; hillier terrain or strong headwinds will use more battery as you pedal harder to ride.

How do I charge the Brompton Electric?

When it comes to charging your Brompton Electric battery, it’s easy. Simply remove the lightweight battery pack bag with one click and plug it in to any regular socket.

Image of a folded Brompton electric next to man reading on a couch

Developed with the experts at Williams Advanced Engineering using Formula E car racing technology, all Brompton Electric bikes come with a 300wh lithium-ion battery that attaches securely to the front of your Brompton in a lightweight 6.4lb package with 1.5L of storage for your essentials in a zipped front pocket, with a side pocket for a 0.5L water bottle.

You can fully charge the Brompton Electric battery in 4 hours, or boost for less if you’re short on time - we even squeezed in an integrated USB port for charging your phone.

Person at train station wearing  the Brompton Electric City Bag

Need more storage when you’re riding? The Brompton Electric City Bag comes with 20 liters of storage, featuring: 

  • a laptop compartment

  • high-viz rain cover

  • stretch side pockets for a 0.75L drink bottle

  • front pocket for papers 

  • a USB slot to charge your device while you ride 

  • shoulder pad so you can wear the bag once you’re off the bike

Are electric bikes legal in the US?

Ebike laws vary state by state, but the federal legal limit for an electric bicycle is 20mph. All Brompton Electric folding bikes are legal and comply with US regulations.

Check out this guide from PeopleForBikes to see electric bike laws in your state.

Converting an existing Brompton to an ebike using a conversion kit is not compliant with US regulations and invalidates all Brompton warranties. The person who converts the bicycle becomes the manufacturer and will be liable in case of an accident or incident.

Can you take ebikes on a bus or train?

Brompton Electric is allowed on Amtrak in checked baggage and on trains with a walk-on bicycle service - make sure it's fully folded down (and in a secure travel bag if you're checking it in) and you're ready for your next cross-country trip. Different cities have different rules for bringing folding ebikes on public transport - we've got 4 major US cities below.


There's 8 million ways to live in New York - and 8 million ways to get around the city. Folding ebikes are allowed on all public transport in New York City - except express buses. For more info head to Metropolitan Transport Authority's website.

San Francisco

Get ready to fly through San Fran! Folding ebikes are allowed on Muni buses and trains.  Taking BART? You're set to go on your Brompton Electric folding ebike - just remember bikes aren't allowed in the first car. For more information head to the San Francisco Bicycle Coalition website.

Los Angeles

The Brompton Electric folding ebike can be brought on Metro Rail in LA. Folding ebikes aren't allowed on Metro Buses in Los Angeles - but if you've got a classic, non-powered Brompton you can bring your bike onto the bus.


According to the CTA website, all folding bikes are allowed on CTA buses and 'L' trains at all times throughout the year - including the Brompton Electric. You can fold it down and bring it onboard, no need to put it onto the bike rack when taking the bus!

Can you take ebikes on a plane?

The legal limit for most commercial passenger planes is 160Wh. Most ebike batteries range from about 300Wh - 1,000Wh. The Brompton Electric battery is 300Wh.

You can’t fly on a passenger plane with the Brompton Electric battery - either in the cabin or checked luggage. 

Going without the motor? Our range of non-powered folding bikes can be safely transported on a plane, ensuring you follow all weight policies with the airline. The Brompton Padded Travel Bag offers a handy way to take your Brompton with you on long-haul journeys.

Can ebikes climb hills?

Ebikes can definitely climb hills - the battery-powered motor provides electric pedal assistance, with different riding modes that can be set based on how much power you want to add to your ride.

The Brompton Electric folding bike features a smart torque sensor to measure the exact amount of pressure you put on the pedals which offer smoother and more direct assistance, to give you a natural-feeling boost to climb up hills. The more you pedal, the more power the Brompton Electric folding bike provides. Similarly, when you want to slow down or you’re heading down hills, the sensor will adapt and lower the assistance provided by the motor. 

What better way to test out the hill-power than riding through the hilliest city in the country? We rode Brompton Electrics in San Francisco - check it out for yourself.


How much is a Brompton electric bike?

Brompton Electric folding bikes begin at $3,850. 0% finance is available with our financing partner Klarna.

The Brompton Electric C Line is the classic all-steel folding bike, supercharged. 

The Brompton Electric P Line is lighter, faster and even more portable thanks to its titanium rear frame and forks.

All registered Brompton Electric bikes are covered with our 7-year frame warranty and 3-year Electric system warranty and can be serviced by our Junction stores or accredited Brompton Electric retailers near you - keeping you on the road for longer.


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Brompton selects our suppliers and components carefully based on reliability, weight and performance. The motor has a higher performance to weight ratio than any other 16"" motor on the market. The Brompton Electric battery offers 300Wh - which is high for the bike's weight class, the additional pedal sensor offers a smoother and more natural riding experience.

How do I test ride a Brompton Electric folding bike?

Ready to try the Brompton Electric for yourself? Take a test ride at Brompton Junction NYC, or in an accredited Brompton Electric retailer near you - make sure you bring a valid ID. Get ready to fly through the city!

Whether you’re a seasoned pro, returning to cycling after a break, or hitting the tarmac for the first time, there’s nothing like exploring on two wheels. Supercharged to go further, the Brompton Electric is a joy to ride.

Image of two smiling people riding Brompton electric bikes through a garden

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