2025 Brompton Electric G Line 4 Speed Electric Folding Bike In Forest Green

Electric G Line. The most versatile E-bike in the world.

Expertly engineered to go where others can’t. Electric G Line is the first ever Brompton with the ride feel of a full-size bike.

Brand-new geometry, 20” wheels, game-changing comfort and capability. All holistically designed around the fold that made them famous. Ride it, fold it, store it anywhere.

Electric G Line takes you there.

An e-bike that makes you smile inside and out

Brompton designed the all-new Electric G Line bike and e-system as one. Every element is meticulously engineered from scratch to work together in the city and beyond. From brilliant on and off-road handling to easy charging and storing in small places, everything feels seamless with this bike.

A super smart way to move

The all-new electric system brings even greater capability to the most versatile bike in the world. With the brand-new drive unit you get everything from Bluetooth over- the-air updates to easy maintenance features.

Powered to go places

Go anywhere in all weathers. With the Electric G Line’s all-new 250-watt rear hub motor, you have superb stability and traction on all ground. Choose from three levels of assistance and be gently propelled around corners, up hills, and over distances. Rigorously tested to the moon and back (over 1,038,640 km), this e-bike confidently goes where you go.

The best battery ever

345Wh of lightweight power. For the Electric G Line, Brompton designed a 20% more efficient motor with the highest capacity battery ever, all to fit within the Brompton fold. You can explore from 20-45 miles (30-60km) in one go. And when it comes to charging, it’s super easy. Remove the battery pack with one quick click and plug in anywhere.

Tested for durability, serious about safety

Designed with the same systems engineering approach found in the automotive and aerospace industries, the Electric G Line sets the benchmark for quality and safety.  Brompton bikes are independently certified and accredited - UL2849 and EN 15194 compliant. So you can explore and store with peace of mind. Brompton set their safety standards high and believe everyone else should too. Brompton is actively supporting greater regulation through the Battery Breakdown Safety Bill -

Get the best from your bike with the Brompton Electric app

New Bluetooth connectivity between your bike and phone means the latest e-system upgrades happen effortlessly, over the air. You can use the dashboard on your phone to control your power mode and lights, maximise battery life, track your distance and more.

Integrated lighting

Whatever time of the day, the Electric G Line is at the ready. The all-new light set powered by your battery and fits inside the fold. A 9-watt beam on the front illuminates even the darkest off-road paths. And at the back, a 1-watt light with a built-in reflector helps to keep you seen.

Brompton Advance 4-speed System

Works seamlessly with the rear hub motor and power modes to give you everything you need for steep climbs and long cruises. Super compact, super lightweight and designed in-house to fit perfectly inside the fold.

Brompton Saddle (wide)

Ergonomically designed in-house to suit the pedal style on electric bikes. Maximum comfort and stability. Features a carry handle under the nose for easing towing and lifting and loops for Brompton lights and luggage

Key Features Of The 2025 Brompton Electric G Line 

• Front Wheel: Single wall rim, 250W brushless DC motor providing assistance up to 25km/h
• Battery: 345Wh 36V with LED display. Range 20-45 miles. 5V 1.5A USB port to charge portable devices. 4-hour full charge using included 2A charger
• Range: 20-45 miles
• Connectivity: Brompton Electric iOS and Android apps available for download
• Gears: 4-speed
• Shifters: Brompton 4 speed derailleur shifter
• Tyres: 349 x 35C Schwalbe Marathon Racer. A puncture resistant tyre with a reflective sidewall
• Lighting: AVY Integrated Lights
• Luggage: Essentials bag with 1.5L storage; Optional: 20L City bag available separately
• Folded Size: 690mm H x 730mm L x 402mm W
• Weight From 16.1 kg (excluding battery)

What's Included

• Manual, keys and charger included
• Built, configured and tested by fully trained approved technician
• Full technical handover and ongoing support if required
• We offer a free follow up service at 175 miles