Description
Brompton Electric G Line 4-Speed
Electric G Line. The most versatile bike in the world.
The all-new one-bike solution for the city and beyond.
You can ride the Electric G Line anywhere and take it everywhere.
We 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.
Happily delivering on all sorts of surfaces. Confident in all conditions. Comfortable hour after hour. Electric G Line is expertly engineered to give you everything you need for the rough, the smooth and the beautiful. You can run a rack, fenders, and bags, add water bottles, and even store your toolkit inside the frame. And with the original Brompton fold, the ever-ready Electric G Line transforms into a compact, locked package in under 20 seconds. Goes on trains. Travels in car trunks. Stores in small spaces (including one-person tents). In a world full of possibilities, G Line is your one-bike route to everywhere.
Big on ride feel, compact in size
We created G Line to be the best one-bike solution for the city and beyond, and then we made it a Brompton. The frame geometry is comparable to a full size bike, yet it transforms into a compact package that stores and travels easily. So you can go anywhere.
Experience the power of innovation
Brompton’s all-new compact electric system, 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.
Key Details
We 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.

The most versatile e-bike in the world
Every element is meticulously engineered from scratch to work together in the city and beyond.
20” wheels
Big enough for any adventure yet compact enough to fit inside the fold, equipped with custom-made puncture-resistant tires.
Roller Rack
Comes fitted with G Line fenders and roller rack as standard. With full-length coverage front and back, the fenders keep you protected from road spray, while the lightweight rack provides a stable platform for cargo. Plus, the additional wheels make your folded bike roll smoothly.
US-tuned motor
Assist up to 20 mph for a quicker, more exhilarating ride.
Smart control
Handlebar display with Adaptive Range Estimation, Start Assist, and more.
Adventure-ready
UL-certified for proven safety and built with a rugged front carrier block. Up to 50 miles of range.
Always improving
Companion app offers over-the-air updates and new features.
Specifications:
Weight: From 42.9 lb
Weight without battery: 34.6 lb
Speed: 4-speed
Material: Steel
Folded Size: from 28.3″ / 72cm (D), 26.2″ / 67cm (H), 16″ / 41cm (W)
Main Frame: Hand-brazed steel main frame
Rear Frame: Steel
Fork: Aluminum fork with mounting bosses
Grips: Ergonomic grips
Seatpost: Small – Standard Black, Medium – Extended Black, Large – Telescopic Black
Saddle: Standard Wide
Seatclamp: G Line Aluminum
Hinge Clamps: Self-aligning hinge clamps
Pedals: Wide Platform Quick Release
Drivetrain: 4-speed Brompton (163%)
Number of gears: 4 gears
Chainset: 50T
Headset: Brompton headset
Shifters: Microshift
Sprockets: 11-13-15-18 Tooth
Rear Wheel: 20″
Front Wheel: 20″
Tires: Schwalbe G-One All Round 54-406. Tan wall
Fenders: Included
Lighting: AVY Integrated
Pump: Not included
Rack: Included
Brakes: Tektro Hydraulic Disc brakes with 140mm Front / 160mm Rear
Front Carrier: Large diameter front carrier block adaptor for all types of Brompton luggage
On Bike Accessories: G Line essential battery bag & Brompton Bell
Battery: 345-wh with LED display. 4-hour full charge using included 2A charger
Range: 20-45 miles (30-60km)
Luggage: Essentials bag with 1.5L storage
Connectivity: Brompton Electric iOS and Android apps available for download
Battery Safety Compliance: UL 2849 compliant e-bike system. Meets NYC regulations for safe sale and use of e-bikes and batteries
Sizing & Geometry:
G-Line bikes are sized S, M, and L, with seatpost and stem lengths tailored to suit different rider heights. For more details on finding the right fit, see the size tables below.

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WARNING: This product contains chemicals known to the State of California to cause cancer reproductive harm
The products in this store may expose you to chemicals such as Nickel which are known in the state of California to cause cancer, and Bisphenol A (BPA) which is known to the state of California to cause birth defects or other reproductive harm.
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