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T Line: One

T Line: One


The lightest Brompton ever made. Over 150 components designed ground-up. Masterfully built to deliver an ultra-light, agile and responsive ride. This is the benchmark for freedom in the city

Brand-new everything. Except 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.


Ultra-light. As strong as steel.

The entirely re-engineered T Line titanium frame weighs 37% less than our original all-steel equivalent and is just as strong.

At 16.4 lbs in total, the T Line is comparable to a carbon road bike. Yet, it can be comfortably ridden by a 242 lbs rugby player. And withstand the punishing impact of the city.


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 new 54mm roller wheels
Fork One piece carbon fork and steerer with magnetic pedal holder
Handlebar type 31.8mm Superlight carbon handlebar in 560mm width
Seatpost Superlight seatpost with carbon core and 0.3mm steel armour. Standard length for up to 33” inside leg
Saddle Superlight saddle with carbon rails and base with integrated carry handle and light mount
Tyres Schwalbe ONE with Addix race compound and v-guard puncture protection
Folded dimensions 25.4" (H) x 23.6" (W) x 12.6" (D) (645mm x 600 mm x 320mm)
Weight (approx.) 16.4 lbs
Grips Superlight lock-on foam grips
Seatclamp Machined aluminium seat clamp and rear frame clip in anodized matt black finish
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 with sealed bearings and allen key axle
Rear Wheel Superlight Advance 1 speed wheel - Lightweight rim, double-butted spokes and aluminium hub body
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 Exo Bottom Bracket
Headset Grade 9 titanium diameter tubes with integrated headset and spring loaded steerer catch hinge
Front carrier Large diameter front carrier block adaptor for all types of Brompton luggage
Blasted Titanium