T Line Urban - 4 Speed

Colour: Blasted Titanium
Handlebars: Mid
In stock - dispatched within 2 working days
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Ultralight. Titanium
Ultralight 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 7.95 kg T Line Urban - 4 Speed delivers unmatched performance and practicality. Fine-tuned for city performance. Fenders and luggage system.
Just as compact
Just as compact
4-speed gearing system expertly designed to fit inside the fold and weighs from just 7.95 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.
T Line T Line details

T Line Urban - 4 Speed

Introducing the Brompton T Line Urban - 4 Speed, the pinnacle of folding bike design and urban mobility. Crafted from superlight titanium, this lightweight folding bike redefines commuting with its precision-engineered features. The 4-speed drivetrain is optimized for city performance, ensuring smooth gear transitions whether you're accelerating, cruising, or climbing hills.

As the lightest folding bike in its class, the Brompton T Line Urban offers unmatched portability and durability. Its compact, lightweight design makes it easy to carry onto public transportation or store in small spaces without sacrificing performance.

Experience the freedom and convenience of city cycling with the Brompton T Line Urban - 4 Speed, the best lightweight folding bike available. Perfect for daily commutes or weekend rides, this titanium folding bike combines strength, efficiency, and style for the ultimate urban mobility solution.

T Line Urban

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 Urban - 4 Speed

Feel inspired by titanium's lightweight, bright, and mesmerizing qualities with the T Line Urban from Brompton. With this sleek bike, you can experience the city in an immersive way. By choosing this lightweight yet powerful model, you can keep focusing on your surroundings as your bike does all the work for you. From noticing the change in a breeze that signifies the entrance to a city to the unique sounds you only hear when riding the T Line Urban lets you embrace urban life completely.

To get you around the city, this bike includes 4-speed gears, which improve control and agility. Expertly engineered, this lightweight frame weighs 37% less than steel equivalents, improving the gearing elements and on-road positioning.

Being able to say yes to every opportunity is made possible by the simple folding system, which means you can transition from two wheels to two feet in just 20 seconds. Also light to carry, you can move around with ease in a much better way than compared to traditional bikes.

Precision engineering means you can tackle everything that comes your way. By feeling empowered thanks to the versatile T Line Urban, a more energetic and active way of life awaits you! Brompton can provide a reliable transport method; it's up to you to find your next adventure. Whichever horizon you choose to explore, with the T Line Urban by your side, a positive experience is guaranteed.


4 Speed
From 7,95 kg
From 7,95 kg
4 Speed (Urban)
Folded Size
645.16 mm (H) ×599.44 mm (W) ×320.04 mm (D) (25.4" x 23.6" x 12.6")
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 Extended, Black (35")
Superlight Carbon
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 4 speed drivetrain, 163% range
Number of gears
4 gears
Superlight carbon crankset with hollow BB30 axle, integrated spider, 50T chainring and chainguard
Bottom Bracket
FSA Mega Evo Bottom Bracket
Grade 9 titanium diameter tubes with integrated headset and spring loaded steerer catch hinge
4 speed trigger shifter
11-13-15-18 tooth
Patent pending direct mount 4 speed derailleur
Rear Wheel
Lightweight rim, double butted spokes, aluminium hub body and 4 speed freehub body
Front Wheel
Lightweight rim, double butted spokes and aluminium hub with sealed bearings and allen key axle
Schwalbe ONE with Addix race compound and v-guard puncture protection
Tubolito S-tubo 34g tube with presta valves
Not included
Not included
Dual Pivot Calipers
Front Carrier
Large diameter front carrier block adaptor for all types of Brompton luggage
On Bike Accessories
Not included
* Specifications are subject to change without notice

Reviews & Questions

T Line Urban - 4 Speed

Delivery & Returns


Get free delivery on all of our products, sent by our trusted courier partner between 3-5 working days, with no cost to you. Easy set up. Follow the Quick Start Guide to add your saddle and do some basic checks, and you’ll be ready to cycle away in less than 10 minutes from opening the box.


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.


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