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T Line is lighter, faster, and even more fun.
T Line is lighter, faster, and even more fun.
Brompton

Brompton T Line Explore 12 Speed Folding Bike 2025 in Blasted Titanium - Mid

£4,740.00
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With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Hassle free returns

Any item, except food, face masks or e-gift vouchers (full e-gift vouchers T&Cs are listed on the respective product pages) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase. It is recommended that you use a recorded delivery service to ensure your items are received by us. We cannot assume responsibility for items that are lost in the post.

Online or in-store purchases can both be returned to any store free of charge or can be returned by post after completing the online returns form. If you are returning an item due to a fault, we will refund your postage.

If you wish to return your bike to us, please keep the box it arrived in and let us know using the returns form and we will arrange collection.


Customer Returns Form

If you wish to cancel, return or exchange an order please fill in the form below. Returns can be processed quicker if all required information is added.



Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the products have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:

1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £24.99 for collection. If you do not have the original box, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid receipt.

Brompton T Line Explore 12 Speed Folding Bike 2025 in Blasted Titanium - Mid

Season:2025

Brand:Brompton

Code:M12L/BTi/rTi/FCB/SP0c/CAR

Test rides available from our Notting Hill branch. Contact the store for further details.

Invention, innovation, imagination. These ideals have been the driving principles at Brompton since the beginning, when founder Andrew Ritchie set out to engineer a folding bike to unlock the city.


The original Brompton, made from robust steel, is a design icon in its own right. For five decades it’s set the standard for folding bikes. There’s something about setting a high bar, and continuously raising it under your own steam.

Those with ambitious agendas move apart. The T Line was conceived to lift the Brompton feeling to a new plane, engineered with a lightness unlike anything you’ve experienced – at least, not yet.

In the pursuit of lightweight performance, Brompton have taken the best of the Brompton experience and amplified it with the power of titanium. Ready for lift-off?

Please Note: Primary images are of the 4-speed model. These images will be updated when images of the 12-speed become available.

Key Features & Benefits:

  • Ultimate Ride:The re-engineered titanium frame makes it even more dynamic and agile - it’s a joy on the road.
  • Carbon Throughout:Vibration-dampening fork, handlebar and crankset for the smoothest ride ever.
  • Brompton 12 speed:Superlight 4-speed derailleur and wide range 3-speed hub. The lowest gear ever. ​The highest gear ever.​ And lots of small steps between, making this an even more comfortable ride for touring, exploring, commuting and beyond.​

Full Specification:

  • Main Frame:Large diameter grade 9 titanium tubes, orbital and tig welded main frame with titanium cast bottom bracket sleeve.
  • Rear Frame:Advance Superlight rear frame with replaceable hook, redesigned suspension block and new 54 mm roller wheels.
  • Fork:One-piece carbon fork and steerer tube with magnetic pedal support.
  • Number of Gears:12
  • Shifters:Brompton 4 x 3 speed trigger shifters
  • Chainset:Superlight carbon crankset with BB30 hollow axle, integrated spider, 50T chainring and chain cover
  • Chainrings:50T
  • Hinge:Self-aligning hinge locking levers in machined aluminium and plates with matt black anodised finish.
  • Rear Cassette:4-speed - 11-13-15-18 teeth
  • Rear Derailleur:Direct mount 4 speed derailleur
  • Bottom Bracket:FSA Mega Exo BB
  • Pedals:Superlight aluminium cnc foot pedal with left QR pedal
  • Front Wheel:Lightweight rim, double-thickness spokes and aluminium hub body with sealed bearings and hexagonal key axle
  • Rear Wheel:Lightweight rim, 12 speed rear hub, double-thickness spokes and aluminium hub body with sealed bearings and hexagonal key axle.
  • Front Tyre:Schwalbe ONE with Addix racing compound and v-guard puncture protection
  • Rear Tyre:Schwalbe ONE with Addix racing compound and v-guard puncture protection
  • Brakes:Brompton Dual Pivot Calipers
  • Handlebars:Superlight 31.8 mm carbon handlebar with 560 mm width, available in low and medium height.
  • Handlebar Grips:Super-lightweight self-locking foam grips
  • Headset:Brompton headset
  • Saddle:Super-light saddle with oval carbon rails and carbon-reinforced base, lightweight padding, integrated carry handle and lightweight attachment
  • Seatpost:Superlight seatpost with carbon core and 0.3 mm steel reinforcement.
  • Folded size:645mm (H) x 585mm (W) x 270mm (D)
  • Accessories:Curved profile mudguards with titanium sheaths and rubberised widening, Tubolito S-tube 34g inner tubes with presta valves, Brompton front luggage carrier block
  • Weight:Approx. 8.8 kg
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.

Handlebar Type:
2 types offer different riding positions for varying heights of rider and styles of riding:
Low: Shorter riders will find this a good all-round position and taller riders will be in a lower, sporty ride position, which may be preferable if the rider is used to a road bike.
Mid: Brompton's classic handlebar shape, which for most riders provides an all-round, neutral position. Shorter riders will find this offers a more upright, leisurely position and taller riders will find this still gives a slightly sporty position.

Information on Seatpost Length
-Balfe's offer the Standard post (comes fitted to low/mid handlebar models) and Extended post (comes fitted to high handlebar models) on our bikes, however the telescopic post is available to purchase separately:
Standard: Suitable for those with an inside leg measurement of 33 inches / 84 cm maximum.
Extended: 2.5 inches / 60mm longer than the standard. This seatpost option does leave the saddle higher when the bike is folded and therefore the below option may suit you if you wish to keep the bike as small as possible when folded.
Telescopic: Designed for those with an inside leg greater than 35 inches / 89cm

Next level frame

The T Line is lighter, faster, and even more fun. With a re-engineered all-titanium frame that’s ultralight and as strong as steel, and super responsive carbon components, you feel the wow with every ride.

Manufacture

All Brompton titanium framesets start their life as a set of tubes in a specialist TIG welding factory in Sheffield, 300km north of Brompton's London factory. Brompton built this dedicated space as titanium requires different skills, machinery, and processes to steel.

T Line TIG welding

All-new Wheelset

Brompton's lightest, sturdiest wheelset. With a new rear hub designed ground-up to accommodate the new compact 4-speed gear set. Tested on a purpose-made rig and fired with mud, water and sand for hundreds of hours. This wheelset stands up to the abuse of the city. Now fitted with hex key axles and a new hanger mount, so removing them for roadside repairs or maintenance is quick and easy.

Warranty Information for Brompton:

All new Brompton bicycles registered with Brompton are covered by a 7-year unlimited mileage warranty against manufacturing and material defects for the main frame components, commencing from the date of sale.
All Electric parts on the Electric P Line and Electric C Line are covered by a 2-year warranty. 3 years if you register your bike.
Other non-wearing parts on the bicycle (e.g. crank arms, brake calipers, mudguards, etc.) and other parts and accessories are covered by a 2-year warranty against manufacturing and material defects.
Bicycles not registered are subject to a 2-year warranty on the mainframe components, commencing from the date of sale.
For full warranty policy please visit brompton.com

Sizing Information
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