Brompton T Line 4 Speed (with Front Carrier Block) 2026 - Folding Bike

The Brompton T Line 4 Speed sets a new benchmark for urban mobility, combining cutting-edge materials with the practicality Brompton are famous for. At the heart of the bike is a Grade 9 titanium frame, welded for strength and engineered to be 37% lighter than equivalent steel frames. The advanced rear triangle integrates a replaceable hanger, suspension block and 54mm roller wheels for easy manoeuvring when folded.

Key Features:

• Grade 9 titanium frame with fast 20s folding system
• One-piece carbon fork with steerer and pedal holder
• Brompton 4-speed drivetrain for smooth city riding
• Dual pivot calliper brakes for controlled stopping
• 16” wheels with Schwalbe ONE tyres & puncture protection
• Flat handlebar for agile urban handling
• Front carrier block included for luggage options
• Available with 0% APR finance

Up front, the carbon fork and steerer keep weight down while adding stiffness for responsive handling. A magnetic pedal holder ensures neatness when folded, further enhancing portability. With its ultra-compact fold, the bike transitions from road-ready to carry-friendly in just 20 seconds, making it ideal for commuters hopping between trains, buses and offices.

The 4-speed drivetrain is carefully optimised for city riding, offering the right balance of acceleration, cruising efficiency, and climbing capability. Whether tackling short hills or navigating stop-start traffic, gear shifts are smooth and intuitive, keeping you in control. A superlight carbon crank set with a 50T chainring and chainguard delivers reliable power transfer, while the FSA Mega Evo bottom bracket adds long-lasting efficiency.

Braking comes courtesy of dual pivot callipers, providing consistent stopping performance in all conditions. Rolling on 16” lightweight rims with double-butted spokes and aluminium hubs, the bike is fitted with Schwalbe ONE tyres that are fast, grippy, and armed with V-Guard puncture protection to keep flats at bay.

Finishing touches include a superlight seat post and saddle for all-day comfort, along with CNC aluminium pedals, one fixed and one quick release for a compact fold. The flat handlebar gives a direct, agile ride feel, perfect for weaving through busy streets. With the front carrier block fitted, you can expand your carrying capacity using Brompton’s dedicated luggage range from work bags to travel packs.

Occasionally, without notice, manufacturers change product design and/or specifications.