Brompton

G-Line Electric

The Brompton Electric G Line with Advance Roller Frame and Handlebar Control (e-Motiq System / 4-Speed) combines full-size 20-inch wheel stability, all-terrain capability, and electric assistance with Brompton’s signature compact folding design. Built on a hand-brazed steel frame and an aluminum fork with accessory mounts, it introduces Brompton’s custom e-Motiq rear hub drive system (250W) and a 345Wh removable battery providing up to 90 km (55 miles) of pedal assist. Starting from 19.5 kg (42.9 lbs) with battery, it comes fitted with the upgraded Advance Roller Frame (SuperRoll+), an integrated handlebar control screen, Tektro hydraulic disc brakes, and a 4-speed derailleur drivetrain.
Specifications Breakdown
E-Drive System
- Motor: Brompton e-Motiq Rear Hub Motor, 250W power output, 30Nm to 40Nm peak torque, Smart Torque Sensor, Start Assist Mode.
- Battery: 345Wh Greenway Battery (Detachable front bag system, up to 30–90 km / 20–55 miles range, ~5-hour full charge time).
- Display & Control: e-Motiq Handlebar Control Screen with speed display, battery level indicator, light controls, dynamic range prediction, and Bluetooth connectivity for over-the-air (OTA) updates.
Frameset & Ergonomics
- Main Frame & Rear Triangle: Precision-Drawn Heat-Treated Hand-Brazed Steel Tubing.
- Fork: Aluminium Fork with integrated accessory mounting bosses.
- Sizing Options: Small (152–168 cm), Medium (168–183 cm), or Large (183–198 cm).
- Folded Dimensions: 28.7" L x 27.1" H x 15.8" W (73 cm L x 69 cm H x 40.2 cm W).
- Cockpit: Ergonomic Lock-On Rubber Grips with Wide Riser Handlebar.
- Seatpost & Saddle: Black Anodized Seatpost (Standard/Extended/Telescopic) with Brompton Electric Wide Saddle.
Drivetrain & Brakes
- Drivetrain: Brompton 4-Speed External Derailleur (163% Gear Range).
- Shifter: Brompton / Microshift 4-Speed Trigger Shifter.
- Rear Derailleur: Brompton Direct-Mount 4-Speed Derailleur.
- Brakes: Tektro Hydraulic Disc Brakes (140mm Front / 160mm Rear Rotors).
- Crankset: 6061 Forged Aluminium Crank Arms with 50T Chainring and Integrated Chainguard.
Wheels & Accessories
- Rims & Hubs: 20" (ETRTO 406) Alloy Disc Rims, Sealed Bearing Front Hub, e-Motiq Rear Hub Motor.
- Tires: Schwalbe G-One Allround, 20 x 2.25" (54-406), Tanwall, Tubeless-Ready.
- Roller Frame: Advance Roller Frame (SuperRoll+) with 80mm Easy-Roll Bearing Wheels (10 kg cargo load capacity).
- Integrated Accessories: Full-Coverage All-Terrain Mudguards, 9W High-Output Integrated Front & Rear Lights, Front Carrier Block Adaptor, 4L Essentials Battery Bag.
- Approx. Weight: From 19.5 kg / 42.9 lbs (with battery).
Key Highlights
- Custom e-Motiq Rear Motor System: Rear-wheel drive motor delivers 250W power and torque-sensing assistance, providing smooth acceleration on city streets and gravel paths without drag when riding unassisted.
- Handlebar Control Screen: Integrated handlebar controller puts assist mode toggles, Start Assist, battery status, speed, and real-time range estimates right at your fingertips.
- SuperRoll+ Advance Roller Frame: Four 80mm bearing roller wheels on the rear rack shift the folded bike's center of gravity for smooth, effortless rolling through train stations and offices.
- 20-Inch Wheels with All-Terrain Rubber: High-volume 2.25" Schwalbe G-One Allround tires pair with 20-inch rims to soak up potholes, cobblestones, and unpaved canal paths far better than 16-inch folders.
- Direct-Mount 4-Speed Derailleur & Hydraulic Discs: A compact 4-speed derailleur setup (163% gear range) keeps weight down while Tektro hydraulic disc brakes ensure all-weather stopping control.
We offer shipping rates as follows:
- £4.99 delivery fee on orders under £100 (excluding bikes and large items)
- FREE delivery on orders over £100 (excluding bikes and large items)
- Personal bike delivery available within a 30-mile radius of our shop for a £60 delivery fee
Please view our full delivery and returns policy for further details.

Description

The Brompton Electric G Line with Advance Roller Frame and Handlebar Control (e-Motiq System / 4-Speed) combines full-size 20-inch wheel stability, all-terrain capability, and electric assistance with Brompton’s signature compact folding design. Built on a hand-brazed steel frame and an aluminum fork with accessory mounts, it introduces Brompton’s custom e-Motiq rear hub drive system (250W) and a 345Wh removable battery providing up to 90 km (55 miles) of pedal assist. Starting from 19.5 kg (42.9 lbs) with battery, it comes fitted with the upgraded Advance Roller Frame (SuperRoll+), an integrated handlebar control screen, Tektro hydraulic disc brakes, and a 4-speed derailleur drivetrain.
Specifications Breakdown
E-Drive System
- Motor: Brompton e-Motiq Rear Hub Motor, 250W power output, 30Nm to 40Nm peak torque, Smart Torque Sensor, Start Assist Mode.
- Battery: 345Wh Greenway Battery (Detachable front bag system, up to 30–90 km / 20–55 miles range, ~5-hour full charge time).
- Display & Control: e-Motiq Handlebar Control Screen with speed display, battery level indicator, light controls, dynamic range prediction, and Bluetooth connectivity for over-the-air (OTA) updates.
Frameset & Ergonomics
- Main Frame & Rear Triangle: Precision-Drawn Heat-Treated Hand-Brazed Steel Tubing.
- Fork: Aluminium Fork with integrated accessory mounting bosses.
- Sizing Options: Small (152–168 cm), Medium (168–183 cm), or Large (183–198 cm).
- Folded Dimensions: 28.7" L x 27.1" H x 15.8" W (73 cm L x 69 cm H x 40.2 cm W).
- Cockpit: Ergonomic Lock-On Rubber Grips with Wide Riser Handlebar.
- Seatpost & Saddle: Black Anodized Seatpost (Standard/Extended/Telescopic) with Brompton Electric Wide Saddle.
Drivetrain & Brakes
- Drivetrain: Brompton 4-Speed External Derailleur (163% Gear Range).
- Shifter: Brompton / Microshift 4-Speed Trigger Shifter.
- Rear Derailleur: Brompton Direct-Mount 4-Speed Derailleur.
- Brakes: Tektro Hydraulic Disc Brakes (140mm Front / 160mm Rear Rotors).
- Crankset: 6061 Forged Aluminium Crank Arms with 50T Chainring and Integrated Chainguard.
Wheels & Accessories
- Rims & Hubs: 20" (ETRTO 406) Alloy Disc Rims, Sealed Bearing Front Hub, e-Motiq Rear Hub Motor.
- Tires: Schwalbe G-One Allround, 20 x 2.25" (54-406), Tanwall, Tubeless-Ready.
- Roller Frame: Advance Roller Frame (SuperRoll+) with 80mm Easy-Roll Bearing Wheels (10 kg cargo load capacity).
- Integrated Accessories: Full-Coverage All-Terrain Mudguards, 9W High-Output Integrated Front & Rear Lights, Front Carrier Block Adaptor, 4L Essentials Battery Bag.
- Approx. Weight: From 19.5 kg / 42.9 lbs (with battery).
Key Highlights
- Custom e-Motiq Rear Motor System: Rear-wheel drive motor delivers 250W power and torque-sensing assistance, providing smooth acceleration on city streets and gravel paths without drag when riding unassisted.
- Handlebar Control Screen: Integrated handlebar controller puts assist mode toggles, Start Assist, battery status, speed, and real-time range estimates right at your fingertips.
- SuperRoll+ Advance Roller Frame: Four 80mm bearing roller wheels on the rear rack shift the folded bike's center of gravity for smooth, effortless rolling through train stations and offices.
- 20-Inch Wheels with All-Terrain Rubber: High-volume 2.25" Schwalbe G-One Allround tires pair with 20-inch rims to soak up potholes, cobblestones, and unpaved canal paths far better than 16-inch folders.
- Direct-Mount 4-Speed Derailleur & Hydraulic Discs: A compact 4-speed derailleur setup (163% gear range) keeps weight down while Tektro hydraulic disc brakes ensure all-weather stopping control.

G-Line Electric

Specifications Breakdown

Key Highlights

Specifications Breakdown

Key Highlights

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