Skip to product information
Brompton G Line Electric folding bike on the white background.

Brompton Electric G Line with SuperRoll+ e-Motiq system - 4-speed in Space Black, Small

£3,699.00

Main specification

  • Derailleur Brompton 4-speed Brompton (163%)
  • Gears 4
  • Drivetrain type Chain
  • Brakes Brompton Tektro Hydraulic Disc brakes with 140mm Front / 160mm Rear, Hydraulic disc brake
  • Fork/Shock model Aluminium fork with mounting bosses
  • Wheel size 20"
  • Weight (kg) 19.5

Drive system

  • Drive unit Brompton e-Motiq
  • Battery Brompton 345-wh with LED display.
  • Battery capacity (Wh) 345
  • Display Other
Frame Size

Electric G Line – One Electric Bike That Does It All

The Electric G Line is built as a complete system from the ground up, designed to work seamlessly in the city and beyond. It rides with the confidence of a full-size bike, handles mixed surfaces with ease, and still folds down small enough to store and travel easily. Thoughtfully engineered, practical, and ready for everyday riding or bigger adventures, this is a true one-bike solution from Brompton.

Why You’ll Love It

  • 20” wheels
    Large enough for comfort and control on longer rides, yet compact enough to fit neatly within the fold. Fitted with custom puncture-resistant tyres.

  • Mudguards & Roller Frame (standard)
    Full-length mudguards keep road spray off, while the lightweight roller frame adds stability for carrying cargo and allows the folded bike to roll smoothly.

  • Smart control display
    Handlebar-mounted screen with Adaptive Range Estimation, Start Assist, and clear ride information.

  • Adventure-ready design
    Confident handling, rugged front carrier block, UL-certified safety, and up to 50 miles of assisted range.

  • Always improving
    The companion app enables over-the-air updates, keeping your bike features up to date over time.

A person riding on the Brompton g Line folding bike on the road in from of the house.
A person seating on the mountain lift with a Brompton G Line folding bike.

Big on ride feel, compact in size

The Brompton G Line is designed as a true one-bike solution for both city riding and adventures beyond. It rides like a full-size bike, with a comfortable and confident frame geometry, yet still folds down into a compact package that’s easy to store and transport.

A person loading the Brompton G Line folding bike to the white car.

Experience the power of innovation

Brompton's all-new compact electric system is engineered from the ground up in the UK. Featuring a robust rear motor and a cutting-edge battery rigorously tested for unmatched reliability and safety. Stay ahead with over-the-air updates and seamless integration with our bike app for your smartphone—designed to elevate your ride to new heights.

Diagram of a bicycle with dimensions for small, medium, and large sizes on a white background.

Electric G Line sizes

G Line comes in three easy-to-choose sizes based on your height. Small, medium or large. The single-size frame has varying stem and seatpost heights, developed and tested with a world-leading bike fit expert for the best ride experience.

For more information on how to choose, watch our useful video guide.

Detailed information

Category General Info
Weight From 19.5 kg
Weight Without Battery 15.7 kg
Speed 4-speed
Material Steel
Folded Size from: 28.3" / 72cm (D), 26.2" / 67cm (H), 16" / 41cm (W)
Number Of Gears 4 gears
Range 20-45 miles (30-60km)
Luggage Essentials bag with 1.5L storage
Connectivity Brompton Electric iOS and Android apps available for download
Category Frame
Main Frame Hand-brazed steel main frame
Rear Frame Steel
Fork Aluminium fork with mounting bosses
Headset Brompton headset
Seatclamp G Line Aluminium
Hinge Clamps Self-aligning hinge clamps
Category Cockpit
Handlebar Control Included
Grips Ergonomic grips
Shifters Microshift
Category Seating
Seatpost Small - Standard Black, Medium - Extended Black, Large - Telescopic Black
Saddle Standard Wide
Category Drivetrain
Pedals Wide Platform Quick Release
Drivetrain 4-speed Brompton (163%)
Chainset 50T
Sprockets 11-13-15-18 Tooth
Category Wheels And Tires
Rear Wheel 20"
Front Wheel 20"
Tyres Schwalbe G-One All Round 54-406. Tan wall
Category Brakes
Brakes Tektro Hydraulic Disc brakes with 140mm Front / 160mm Rear
Category Accessories And Utility
Mudguards Included
Lighting AVY Integrated
Pump Not included
Rack Included
Front Carrier Large diameter front carrier block adaptor for all types of Brompton luggage
On Bike Accessories G Line essential battery bag & Brompton Bell
Category Electric System
Battery 345-wh with LED display. 4-hour full charge using included 2A charger