The Brompton Electric G Line 4 Speed brings a new level of refinement to the world’s most iconic folding bike. Hand-brazed in London from steel for strength and durability, the G Line delivers the unmistakable Brompton ride feel. Its clever roller frame and quick-fold design transform the bike into a compact, portable package in under 20 seconds, making it easy to store, carry, or wheel through stations and buildings.

Key Features:

• Hand-brazed steel frame with compact Brompton geometry
• Aluminium fork with integrated mounting points
• 4-speed Brompton drivetrain for versatile gearing
• Tektro hydraulic disc brakes with 140mm rotors
• 20” Brompton rims with Schwalbe G-One Allround tyres
• Quick-fold roller frame for easy transport and storage
• Available with 0% APR finance

Drive Information:

• Motor: 250W brushless rear hub motor, 40Nm torque
• Battery: 345Wh removable battery, 4-hour full charge
• User Interface: LED battery display with integrated mode control

At the heart of the G Line is Brompton’s all-new UK-developed electric system. The compact 250W rear hub motor delivers smooth, reliable assistance up to 25km/h, paired with a torque-sensing bottom bracket for intuitive power delivery. The 345Wh battery, housed in a sleek removable bag, provides a practical range for daily rides and recharges in around four hours. The LED display makes it easy to toggle between power modes on the go, and future-ready connectivity allows firmware updates and integration with Brompton’s smartphone app.

The G Line’s geometry mirrors that of a full-sized bike, ensuring comfort on longer rides while remaining compact when folded. Wide, ergonomic handlebars offer stable handling, while the new in-house designed Brompton saddle supports a natural riding position suited to electric assistance. Hydraulic Tektro disc brakes deliver powerful, predictable braking in all weather conditions, a first for Brompton, and the 20” wheels fitted with Schwalbe G-One Allround tyres balance rolling efficiency with grip across tarmac, gravel, and mixed surfaces.

Designed for riders who go everywhere, the G Line includes practical touches such as mounting points for mudguards, racks, and bottle cages, along with clever in-frame storage for a toolkit. Available in three size options; small, medium, and large. The G Line adapts perfectly to a wide range of riders and styles.

Occasionally, without notice, manufacturers change product design and/or specifications.