Brompton T Line Urban: 4-Speed Folding Bike

T Line: Urban

The ultimate 4 speed folding bike

A complete ultra-lightweight performance package built to fly around the city and beyond. Precision-engineered titanium. Ultra-strong and ultra-light. The all-new compact 4-speed gearing system optimised for city riding. Faster, smoother folding mechanisms. 110kg load carrying for you and your luggage.

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Main frame

Grade 9 titanium tubes, welded main frame with cast titanium bottom bracket manifold

Headset & Stem

Grade 9 titanium diameter tubes with integrated headset and spring loaded steerer catch hinge

Rear frame

Advance Superlight rear frame with replaceable hanger, suspension block and 54mm roller wheels

Fork

One piece carbon fork and steerer with magnetic pedal holder

Weight

7.95kg

Folded Dimensions

645mm (H) x 600mm (W) x 320mm (D) (25.4in x 23.6in x 12.6in)

Saddle

Superlight saddle with carbon rails and base with integrated carry handle and mount

Seatpost

Superlight seatpost with carbon core and 0.3mm steel armour. Standard length for up to 33”/84cm

Seatclamp

Machined aluminium seat clamp and rear frame clip in anodized matt black finish

Grips

Superlight lock-on foam grips

Pedals

Superlight cnc aluminium pedal set with left hand QR pedal

Hinge clamps

Machined aluminium self-aligning hinge clamp levers and plates anodized matt black finish

Front Wheel

Lightweight rim, double butted spokes and aluminium hub body with sealed bearings and allen key axle.

Rear Wheel

Lightweight rim, double butted spokes, aluminium hub body and 4 speed freehub body

Tyres

Schwalbe ONE with Addix race compound and v-guard puncture protection

Tubes

Tubolito S-tubo 34g tube with presta valves

Chainset

Superlight carbon crankset with hollow BB30 axle, integrated spider, 50T chainring and chainguard

Bottom Bracket

FSA Mega Evo Bottom Bracket

Derailleur

Patent pending direct mount 4 speed derailleur

Sprockets

11-13-15-18 tooth

Shifter

4 speed trigger shifter

Chain tensioner

Advance chain tensioner with replaceable hanger mounting

Handlebars

31.8mm Superlight carbon low handlebar in 560mm width

Front carrier

Large diameter front carrier block adaptor for all types of Brompton luggage

Mudguards

Curved profile mudguards with titanium stays and rubberized flap

T Line

Brand-new everything. Except for the fold.

The all-new ultra-light titanium frame. Over 150 specially developed weight-saving components. Three years of obsessive material choices and rigorous testing. Everything brand-new except the fold. Andrew Ritchie, our founder, obsessed over that 40 years ago. Never bettered, just refined, it's the original and still the best.

T Line

Compact drivetrain, designed ground-up.

Nothing rides like it—the entirely new* drivetrain. Designed ground-up to sit inside the fold, to be light as possible and for optimal city performance. The carbon crankset gives greater power transfer. The 60-gram derailleur delivers smooth shifting in a small package. The new gear-ratio, tested from Amsterdam to San Francisco, perfected for city roads.
*patent-pending