Brompton T Line 4 Speed (with Front Carrier Block) 2025 - Folding Bike

Occasionally, without notice, manufacturers change product design and/or specifications.
Frame | Grade 9 titanium tubes, welded main frame with cast titanium bottom bracket manifold. Advance Superlight rear frame with replaceable hanger, suspension block and 54mm roller wheels |
Fork | One piece carbon fork and steerer with magnetic pedal holder |
Headset | Grade 9 titanium diameter tubes with integrated headset and spring loaded steerer catch hinge |
Front Brake | Dual Pivot Calipers |
Rear Brake | Dual Pivot Calipers |
Rear Mech | Brompton 1-speed drivetrain |
Speed | 1 |
Rims | Lightweight rim, double butted |
Front Hub | aluminium hub with sealed bearings and allen key axle |
Rear Hub | Superlight Advance 1-speed wheel - Lightweight rim, double-butted spokes and aluminium hub body |
Spokes | double-butted spokes |
Front Tyre | Schwalbe ONE with Addix Race rubber mix and V-Guard puncture protection |
Rear Tyre | Schwalbe ONE with Addix Race rubber mix and V-Guard puncture protection |
Seat Post | Superlight standard seatpost (33") |
Saddle | Superlight |
Chainset | Superlight carbon crankset with hollow BB30 axle, integrated spider, 50T chainring and chainguard |
Bottom Bracket | FSA Mega Evo Bottom Bracket |
Cassette | 12 tooth |
Pedals | Superlight cnc aluminium pedal set with Fixed right-hand and quick-release left-hand pedals |
Brompton Folding Bike Size Guide
All Brompton bikes have the same size frame and with the standard seatpost fitted are suitable for riders with an inside leg measurement up to 84cm or 33".
Longer seatposts are available for those with inside leg measurements over 84cm.
Seatpost |
Inside Leg (Centimetres) |
Inside Leg (inches) |
Standard |
Up to 84 |
Up to 33” |
Extended |
84 - 89 |
33” – 35” |
Telescopic |
Over 89 |
Over 35” |
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