Brompton G Line Specifications

The Brompton G Line is Brompton’s most capable folding bike, built with 20-inch wheels, hydraulic disc brakes, and all-terrain tires for riders who want folding convenience with real-world adventure capability in Canada.

Brompton G Line Folding Bike Specifications

Key Specifications

• Weight: From 14.8 kg / 32.6 lbs

• Gearing: 8-speed

• Drivetrain: Brompton 8-speed system

• Frame Material: Steel

Folded Dimensions

• Folded Size:

  • 28.3" / 72 cm (Depth)

  • 26.2" / 67 cm (Height)

  • 16" / 41 cm (Width)

  (Larger folded footprint than traditional Brompton models due to 20" wheels, while remaining compact enough for car trunks and storage)

Frame & Fork

• Main Frame: Hand-brazed steel main frame

• Rear Frame: Steel

• Fork: Aluminium fork with mounting bosses

Cockpit & Contact Points

• Grips: Ergonomic grips

• Seatpost Options:

  • Small: Standard black

  • Medium: Extended black

  • Large: Telescopic black

• Saddle: Superlight saddle

• Seat Clamp: G Line aluminium seat clamp

• Hinge Clamps: Self-aligning hinge clamps

Drivetrain & Gearing

• Number of Gears: 8

• Shifters: Microshift

• Derailleur / Hub System: Shimano Alfine hub system

• Chainset: 54T

Wheels & Tires

• Front Wheel: 20"

• Rear Wheel: 20"

• Tires: Schwalbe G-One Allround 54-406, tan wall

  • Designed for mixed surfaces including pavement, gravel, and hard-packed trails

Braking & Safety

• Brakes: Tektro hydraulic disc brakes with 140 mm rotors

• Lighting: Reflectors included

• Mudguards: Included (standard)

Carrying & Accessories

• Front Carrier: Large-diameter front carrier block adaptor compatible with all Brompton luggage

• Rack: Included

• Pedals: Wide-platform quick-release pedals

• Pump: Not included

• On-Bike Accessories: Not included