Brompton G Line Medium

G Line
The most versatile bike in the world.

Coming 2025.

Game-changing comfort
Nothing feels like G Line – the entirely new frame, larger 20” wheels, our widest ever handlebars and tires.

Everything is thoughtfully engineered to give the balanced feel of a full-size bike and all-day comfort that’s nothing short of joyous. You’ll feel the difference on every ride.

Person riding Brompton G Line
Big on ride feel, compact in size
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.

Two folded Brompton G Lines
The most capable Brompton ever
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.

G Line sizes
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.