T Line One - 1 Speed

Colour: Blasted Titanium
Handlebars: Mid
In stock - dispatched within 2 working days
Find your nearest store


Ulltralight. Titanium
Ulltralight Titanium
In the pursuit of lightweight performance, we’ve taken the best of the Brompton experience and amplified it with the power of titanium in pursuit of the lightest folding bike.
Ultimate lightness
Ultimate lightness
At 7.45 kg T Line One - 1 Speed delivers unmatched performance and practicality. Fine-tuned for city performance. Fenders and luggage system.
Just as compact
Just as compact
1-speed gearing system expertly designed to fit inside the fold and weighs from just 7.45 kg.
Ultimate ride
Ultimate ride
The re-engineered titanium frame makes this ultralight folding bike even more dynamic and agile - it’s a joy on the road.
Carbon throughout
Carbon throughout
Vibrations-dampening fork, handlebar and crankset for the smoothest ride ever.
Beauty in the detail
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.
A studio shot of T Line with a purple and cerulean overlay edit A studio shot of T Line with a purple and cerulean overlay edit

Spread the cost

Get a Brompton T Line from as little $218 per month with Klarna.
T Line T Line details

T Line One - 1 Speed

T Line One - 1 Speed. T Line in its purest form, the single-speed machine. Ideal for minimalist commuters, flatter cities, and strong legs.

The Brompton T Line One - 1 Speed is perfect for those who value simplicity and efficiency. With no need to shift gears, it offers a hassle-free, low-maintenance riding experience. Its straightforward design means fewer components, making it lighter and easier to carry and maneuver.

In flat cities, the single-speed setup provides a smooth, consistent ride, allowing you to maintain a steady pace without gear changes. For those with strong legs, it offers a direct, efficient connection between your pedaling power and the bike’s movement.

Experience urban mobility in its purest form with the Brompton T Line One - 1 Speed, perfect for minimalist, flat-terrain commuting.

T Line One

Rider fit


The riser handlebar.

For a natural, relaxed position.



The straight handlebar.

For a sporty, more forward position.


Extended Height Seatpost

For an inside leg up to 35 inches.

T Line Urban

Raw Polished Titanium

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. Shot peened for increased strength. The color, dependant on the light, shines between silvery-white to gunmetal gray.
T Line Urban

Manufacturing a Titanium Folding Frame

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. We built this dedicated space as titanium requires different skills, machinery, and processes compared to steel. The city of Sheffield has a rich history and legacy of expertise in metalworking. TIG Welding requires a high level of skill and coordination between hand, foot and eye. Even the most experienced welders need time and intense focus. Each welder has a signature style making every weld unique. We’re proud of what they do, that’s why each bike is marked by its maker.
T Line Urban
T Line T Line

Which Brompton is right for me?

Your Brompton bike can come in many combinations. Some like color are easy to choose, but other options such as the handlebar type and seatpost type are more difficult to get right. Let us help you out!
T Line One - 1 Speed

Sometimes the greatest of adventures are born from the simplest of ideas. The T Line ONE from Brompton proves that minimalism still encompasses power. Pure in its intentions with expert engineering, this model is the perfect everyday bike for active individuals looking to turn each moment into a carefree adventure.

Weighing just 7.45 kgs, you can commute, travel and explore with nothing holding you back. Don't let this fool you though, as the T Line ONE is a powerhouse that performs amazingly every time. Whilst the titanium frame weighs 37% less than traditional all-steel models, this bike is suitable for users of up to 110 kgs! The frame is also incredibly durable, allowing excellent suspension and road performance.

If the style is important to you, this stylish Brompton classic will not disappoint. With an ergonomic frame that represents the agile future ahead of you, finishing touches such as the discreet fixings and posture-enhancing handlebars boast a characterful design sure to put a smile on anyone's face.

Brompton offers you much more than a new bike; it offers a way of life. Soaring through your day on the T Line ONE will prove that you can go anywhere and experience everything.

1 Speed
From 7.45 kg
From 7.45 kg
1 Speed (One)
Folded Size
25.4" (H) x 23.6" (W) x 12.6" (D)
Main Frame
Grade 9 titanium tubes, welded main frame with cast titanium bottom bracket manifold
Rear Frame
Advance Superlight rear frame with replaceable hanger, suspension block and 54mm roller wheels
One piece carbon fork and steerer with magnetic pedal holder
Superlight lock-on foam grips
Superlight standard seatpost (33")
Machined aluminium seat clamp and rear frame clip in anodized matt black finish
Hinge Clamps
Machined aluminium self-aligning hinge clamp levers and plates anodized matt black finish
Superlight cnc aluminium pedal set with left hand QR pedal
Brompton 1 speed drivetrain
Number of gears
One Speed
Superlight carbon crankset with hollow BB30 axle, integrated spider, 56T chainring and chainguard
Bottom Bracket
FSA Mega Evo Bottom Bracket
Grade 9 titanium diameter tubes with integrated headset and spring loaded steerer catch hinge
12 tooth
Rear Wheel
Superlight Advance 1 speed wheel - Lightweight rim, double-butted spokes and aluminium hub body
Front Wheel
Lightweight rim, double butted spokes and aluminium hub with sealed bearings and allen key axle
Schwalbe ONE with Addix Race rubber mix and V-Guard puncture protection
Tubolito S-tubo 34g tube with presta valves
Not included
Not included
Dual Pivot Calipers
On Bike Accessories
Not included

Reviews & Questions

T Line One - 1 Speed

Delivery & Returns


Enjoy free delivery on all orders over £50. £4.95 delivery fee for any orders under £50. We aim to dispatch your order within 2 working days; sometimes this can be longer during busy periods. Once your order has left our warehouse, we’ll send you an email with tracking information. High-value items over £100 will require a PIN number, which is supplied to you by the courier; you will need to give this PIN to the courier on delivery.

Your bike will arrive ready to ride and all the kit you need to assemble the saddle yourself.


Collect your Brompton bike from our nationwide network of accredited retailers and from our Brompton Junctions. Your bike will be expertly prepared and be ready to ride straight away. Any additional parts and accessories on your order will be sent with your bike.


Brompton is committed to quality; if our products have failed you in any way, please return them and we will either exchange them or give you your money back. If the product is faulty or has arrived damaged, we will reimburse the cost of return postage. Unwanted items may be returned within 28 days at your cost.


Stay in the know

Keep in touch with all things Brompton. Find out about upcoming collaborations, events and more.