Free shipping on orders over $150

G Line. The most versatile bike in the world.  

The all-new one-bike solution for the city and beyond.Big on ride feel and compact in size.

You can ride G Line anywhere and take it everywhere.

Happily delivering on all sorts of surfaces. Confident in all conditions. Comfortable hour after hour. G Line is expertly engineered to give you everything you need for the rough, the smooth and the beautiful. 

You can run a rack, fenders, and bags, add water bottles, and even store your toolkit inside the frame.

And with the original Brompton fold, the ever-ready G Line transforms into a compact, locked package in under 20 seconds. Goes on trains. Travels in car boots. Stores in small spaces (including one-person tents).

In a world full of possibilities, G Line is your one-bike route to everywhere.

Load video:

Expertly engineered to go where others can’t. G Line is the first ever Brompton with the ride feel of a full-size bike. Brand-new geometry, 20” wheels, game-changing comfort and capability. All holistically designed around the fold that made us famous. It's your one-bike solution to the city and beyond.

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.

Larger 20" wheels

Big enough for any adventure yet compact enough to fit inside the fold. The G Line's solidly built 20" wheelset comes equipped with custom-made puncture-resistant tires.

And if you're looking for even more off-road performance and protection, they are tubeless-ready whenever you are.

Hydraulic disc brake:

Super dependable stopping power. The first ever Brompton to come equipped with disc brakes for all terrain, all-weather riding.

Uphill, downhill, rough, smooth

with luggage, in the rain, you can do it all on G Line.

Shimano Alfine Hub Gear

A solidly built 8-gear system that covers all grounds. Super simple to use and brilliantly low maintenance. There's just one trigger on your handlebars. And the gears are tucked away inside your rear wheel hub - protected from water, mud, and impact.

Wide platform pedals

The grippiest, most comfortable Brompton pedal set. For riding on all kinds of ground.

And if you want to make your folded bike even more compact, you can remove the left-hand pedal with a quick squeeze and pull, then stow it securely behind your handlebar.

Wide handlebars

Stay in control. With the custom-designed handlebars, G Line gives you exceptional stability - from leverage on uphills and rough ground to comfort on longer rides. Expertly engineered to fit inside the fold.

Ergonomic grips

Every touchpoint between you and the bike is designed with comfort and control in mind.

The all-new Brompton Ergonomic Grips are developed and tested by us for G Line, so you have the right cushioning and support exactly where you need it.

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 singletrack to rain-soaked cobbles. This bike does it all with ease.

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. The frame geometry is comparable to a full size bike, yet it transforms into a compact package that stores and travels easily. So you can go anywhere.

A fold designed for life

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.

Moving with this folded bike is easy

Fold halfway. Steer with the saddle or tow with your handlebar. C 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.

Carry everything you need

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.

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.

Specifications

Weight

From 32.63 lb

Speed

8-speed

Material

Steel

Folded Size

28.3" / 72cm (D), 26.2" / 67cm (H), 16" / 41cm (W)

Main Frame

Hand-brazed steel main frame

Rear Frame

Steel

Fork

Aluminium fork 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 Quick Release

Drivetrain

Brompton 8-speed drivetrain

Number of Gears

8 gears

Chainset

54T

Headset

Brompton headset

Shifters

Microshift

Derailleur

Shimano Alfine Hub System

Rear Wheel

20"

Front Wheel

20"

Tires

Schwalbe G-One All Round 54-406. Tan wall

Fenders

Included

Lighting

Reflectors

Pump

Not included

Rack

Included

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

Not included

FAQs

Can I test ride a G Line?

Yes! We have an Adventure Orange Medium model in the shop for you to test ride!

What terrain can I ride G Line on?

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.

How many gears does G Line have?

The G line has 8 gears with a 307% gear ratio/range. It has a Shimano Alfine 8-speed hub gear.  

What is the warranty of G Line?

The frame comes with a 7-year warranty once registered.

What is the reach of each size?
  • The small has a reach of 474mm 
  • The medium has a reach of 481mm  
  • The large has a reach of 502mm 
How do I park my G Line?

The G Line supports itself when in park mode. Simply flip the rear wheel under and see the magic.

Does G Line luggage fit on my C, P, T Line Front Carrier Block?

Yes, all our bags use the same mounting system on the front of the bike.

Does G Line come with lighting?

There is an option to buy the bike with lights or without lights.

Does it come with Dynamo?

No.