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We created G Line to be the best one-bike solution for the city and beyond, and then we made it a Brompton.
It rides like a full-sized bike, yet it transforms into a compact package that stores and travels easily. So you can go anywhere.

Rigorously tested over 250,000 km, first to meet industry standards, then to meet ours, G Line goes where others can’t. Now, you can confidently tackle everything from dusty single track to rain-soaked cobbles. Built tough with disc brake stopping power, this bike does it all with ease.


From a go-anywhere bike to a compact package in under 20 seconds. It stores easily. Tucks in car boots and campers and even one-person tents.
There is no need to lock and leave your G Line – it fits into your life indoors and out.

Fold halfway. Steer with the saddle or tow with your handlebar. G Line stays locked together and glides like a wheelie suitcase. Breeze through train stations, along plazas and into buildings. Nothing folds like a Brompton folds.

Brompton Bags sit securely on the front of your bike with one quick click. The unique mounting system places the weight on your frame instead of the handlebars. So when carrying loads, your ride remains brilliantly stable.

Built on fifty years of expertise, Brompton bikes are made for real life and a long life. G Line’s production is a labour of love, with each steel frame handmade and quality assured in our London Factory.
With our 7-year frame warranty, you can ride with peace of mind.
G Line comes in three easy-to-choose sizes based on your height. Small, medium or large. The single-size frame has varying stem and seatpost heights, developed and tested with a world-leading bike fit expert for the best ride experience.
For more information on how to choose, watch our useful video guide.

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It’s the most capable Brompton yet, with the ability to deliver on all sorts of surfaces, including: gravel paths, tow paths, asphalt and well maintained off-road routes. With the feel of a full-size bike.
The G line has 8 gears with a 307% gear ratio/range. It has a Shimano Alfine 8-speed hub gear.
The frame comes with a 7-year-warranty once registered.
The G Line supports itself when in park mode. Simply flip the rear wheel under and see the magic.
Yes, all our bags use the same mounting system on the front of the bike.
There is an option to buy the bike with lights or without lights.
No.
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