Brompton T Line: The Lightest Folding Bike

The lightest Brompton ever made

Ultimate lightness

At 7.45kg, T Line delivers unmatched performance and practicality.

Ultimate ride

The reengineered titanium frame makes it even more dynamic and agile - it's a joy on the road.

Beauty in the detail

Faster to fold, easier to carry. We studied every interaction with the folded bike and improved it. There's nothing like this Brompton, not even other Bromptons.

Ultimate lightness

At 7.45kg, T Line delivers unmatched performance and practicality.

Ultimate ride

The reengineered titanium frame makes it even more dynamic and agile - it's a joy on the road.

Beauty in the detail

Faster to fold, easier to carry. We studied every interaction with the folded bike and improved it. There's nothing like this Brompton, not even other Bromptons.

Titanium is ultra strong and ultra light. It’s the world’s number one naturally occurring metal for strength-to-weight ratio.

Being naturally corrosion resistant means high shine and zero rust in all conditions.

Carbon throughout

Vibration-dampening fork, handlebar and crankset for the smoothest ride ever.

Pioneering innovation

The first ever steel-armoured carbon seat post. Stiff, strong and lightweight. For everyday use.

A close up of the T Line self-aligning hinges

The superlight crankset

Get set for the stiffest, most responsive Brompton crankset ever. Custom-design carbon. Accelerate smoother and faster than ever before.

A studio shot of T Line quick release pedals

Superlight carbon saddle

Our lightest, stiffest saddle. With performance carbon base and rails. An integrated carry handle. And 42% lighter than the standard Brompton saddle.

T Line One - 1 Speed

T Line in its purest form, the single-speed machine. For minimalist commuters, flatter cities, and strong legs.

From 7.45 kg.

T Line Urban - 4 Speed

The ultimate 4-speed folding bike. Precision-engineered titanium. All-new, superlight compact drivetrain with a gearing ratio fine-tuned for city performance.

From 7.95 kg.

T Line Explore - 12 Speed

More gears. More range. Even more possibilities. Just like our bike, Brompton’s 12-speed gear system is unique. We’ve expertly engineered a solution that gives you more gears and more range while still fitting into our compact solution to life on two wheels.

From 8.8 kg.

Tig Welding

All Brompton titanium framesets start their life as a set of tubes in our specialist TIG welding factory in Sheffield, 300km north of our London Factory.

Discover

What is a Brompton T Line?

Invention, innovation and imagination have been the driving principles at Brompton since the beginning.

Over five decades of ambitious design have led us to the T Line. Engineered with a lightness unlike anything you’ve experienced – the T Line has a re-engineered all-titanium frame and super responsive carbon components. At just 7.45kg, the lightest Brompton ever made delivers unmatched performance and practicality.

Add to this the smoother, faster folding mechanisms and experience freedom in the city like never before. The best of the Brompton experience, amplified with the power of titanium.

What are the benefits of a Brompton T Line?

The lightest Brompton ever made
Super responsive carbon components
Reengineered titanium frame provides a dynamic and agile ride
Faster to fold and easier to carry
Accelerate smoother and faster with a superlight crankset

person riding a brompton t line bike in front of a pink wall

Which Brompton T Line model is right for me?

T Line One – 1 Speed

This is the T Line in its purest form. A single-speed machine, perfect for riders who value simplicity and efficiency. With no need to shift gears, the T Line One offers a breezy, low-maintenance riding experience.

The single-speed setup provides a smooth and consistent ride in flat cities. Ideal for minimalist, flat-terrain commuting.

T Line 4-Speed

The T Line 4-Speed has 4 gears – using a tiny derailleur that weighs only 60g – and mudguards. This makes it heavier than T Line One, but not by much.

The T Line Urban 4-Speed offers unmatched portability and durability. The 4-speed drivetrain is optimized for city performance, which ensures smooth gear transitions whether you’re cruising, accelerating or climbing hills.

The perfect city bike: the T Line 4-Speed is easy to carry onto public transport thanks to its compact and lightweight design. Ideal for daily commutes or weekend rides – this model combines efficiency, strength and style for the ultimate urban mobility solution.

T Line 12-Speed

The T Line 12-Speed has a unique gear system that provides more range and more possibilities. This means it's easier to ride up and down hills. Experience the lowest gear ever and the highest gear ever (with lots of small steps in-between). Ensure a comfortable ride for touring, exploring, commuting and beyond.

Enjoy the range of a road bike, hybrid bike, commuter bike or city bike, all with the convenience of the compact Brompton package.

What is the difference between Brompton P Line and Brompton T Line?

The Brompton P Line is designed for lightweight performance. Weighing as little as 9.7kg, the P Line is handcrafted from steel and titanium. The T Line is the lightest Brompton ever made - starting at 7.4kg, built in titanium with custom carbon components.

Designed to pack a punch in the city, the Brompton P Line has a titanium rear frame and fork – refined geometry and an exceptional ride feel. It’s easy to carry and manoeuvre on the go. With Advance Roller Wheels, Continental Contact Urban Tyres and a superlight gear system, the P Line excels on the road. Expect greater efficiency, sharper handling and fast acceleration.

Built in pursuit of lightweight performance, the Brompton T Line is lighter, faster and even more fun. The product of three years of research and development, T Line required new construction techniques, the design of over 150 components in titanium and a new factory dedicated to making the titanium parts.

Expect super responsive carbon components and faster folding mechanisms, alongside Schwalbe One Tyres, superlight carbon crankset and a tig-welded titanium frame. T Line delivers unmatched performance and practicality – for a dynamic and agile ride every time.

Is the T Line fast?

The smaller 16” wheels on a folding bike make it easier to get going, so you can get to your destination faster. This is ideal for the stop-start riding style typically encountered within a city.

With a speedy 20-second fold, the Brompton folding bikes are also perfect for multi-modal travel. Hop on and off public transport, fold and unfold your bike in less time than it takes to order a taxi.

person riding a brompton t line bike in front of green wall

Is the T Line frame robust?

All Brompton T Line frames start their life as a set of tubes in our specialist TIG welding factory in Sheffield, 300km (186 miles) north of our London factory. We built this dedicated space as titanium requires different skills, machinery and process than steel. The city of Sheffield has a rich history and legacy of expertise and metalworking.

The TIG Welding process requires a high level of skill and coordination. Even the most experienced welders need time and intense focus. Each welder has a signature style – making every weld unique.

As well as being ultra-light, titanium is super strong. Being naturally corrosion resistant means high shine and zero rust in all conditions. The result? A robust and reliable T Line frame.