We use cookies to improve your experience on our website and to show you personalised content.
You can read our Cookie and Privacy policy or manage them individually.
You can read our Cookie and Privacy policy or manage them individually.
Next
Prev
Description
Brompton G Line 8 Speed Folding Bike
Expertly engineered to go where others can't, the G Line 8 Speed Folding Bike is the first Brompton to deliver the ride feel of a full-size bike. With brand-new geometry, 20-inch wheels, and game-changing comfort and capability, it redefines what a folding bike can do. Every detail is designed around Brompton’s iconic fold, making it the perfect one-bike solution for the city and beyond.
Brompton G Line Features
The Brompton G Line is built for versatility and performance, featuring a range of innovations that enhance comfort, control, and durability.
Its solidly built 20-inch wheelset is large enough for any adventure yet compact enough to fit within the fold. Custom-made puncture-resistant tyres ensure reliability on varied terrain. Hydraulic disc brakes provide super dependable stopping power, making this the first Brompton equipped for all-weather, all-terrain riding.
The wide platform pedals offer exceptional grip and comfort, with the left-hand pedal designed for quick release to make the bike even more compact when folded. Custom-made wide handlebars deliver outstanding stability, whether climbing, navigating rough ground, or enjoying longer rides. Ergonomic grips ensure that every touchpoint between rider and bike is optimised for comfort and control.
The Brompton G Line is available in three sizes: small, medium, and large, based on rider height. Its single-size frame features different stem and seatpost heights, developed and tested with a world-leading bike fit expert to ensure the best possible ride experience.
Technical Specification
| Weight | From 13.9 kg |
| Speed | 8 Speed |
| Material | Steel |
| Folded Size | 72cm (D) x 67cm (H) x 41cm (W) |
| Main Frame | Hand-brazed steel |
| Rear Frame | Steel |
| Fork | Aluminium with mounting bosses |
| Grips | Ergonomic grips |
| Seatpost | Small - Standard Black, Medium - Extended Black, Large - Telescopic Black |
| Saddle | Superlight |
| Seatclamp | G Line Aluminium |
| Hinge Clamps | Self-aligning hinge clamps |
| Pedals | Wide platform |
| Drivetrain | Brompton 8-speed drivetrain |
| Number of Gears | 8 |
| Chainset | 54T |
| Headset | Brompton headset |
| Shifters | Microshift |
| Derailleur | Shimano Alfine hub system |
| Rear Wheel | 20" |
| Front Wheel | 20" |
| Tyres | Schwalbe G-One Allround 54-406, tan wall |
| Lighting | Reflectors |
| Brakes | Tektro hydraulic disc brakes with 140mm rotor |
| Front Carrier | Large diameter front carrier block adaptor for all types of Brompton luggage |
| On-Bike Accessories | Bell |
Size Guide
Brompton G Line 8 Speed Folding Bike Sizing
Delivery & Returns
Reviews
Unable to display Reviews due to Privacy Settings.
Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".
Q&A
Unable to display Q&A due to Privacy Settings.
Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".
Why buy your bike from Sigma Sports?
Expert Advice
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
Cycle to Work Schemes
Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Bike Delivery Options
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
Laka Insurance
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.