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Brompton T Line 4 Speed Mid Handlebar

Brompton T Line 4 Speed Mid Handlebar
£4,749.00

Main specification

  • Derailleur Brompton 4-speed drivetrain, 163% range
  • Gears 4
  • Drivetrain type Chain
  • Brakes Brompton Dual Pivot Calipers, Rim brake
  • Fork/Shock model One piece carbon fork and steerer with magnetic pedal holder
  • Wheel size 16"
  • Weight (kg) 7.95
Frame Size

Brompton T Line 4 Speed – The Ultimate Lightweight Folding Bike

The Brompton T Line is the lightest and most advanced folding bike in the Brompton range. Built with an ultra-light titanium frame and premium components, it’s designed for riders who want the best in performance, portability and everyday usability.

Finished with a durable Cerakote ceramic coating, the T Line Ceratech offers increased resistance to wear while maintaining its clean, premium look. To help you move around the city with ease, this bike features 4-speed gearing for better control and a smooth, agile ride.

Despite its high-performance design, it keeps the classic Brompton fold, transforming into a compact package in around 20 seconds—easy to carry, store and take anywhere. Lightweight, refined and incredibly versatile, this is a folding bike built without compromise.

Precision, power and portability.
Person riding a folding bicycle on a sidewalk with a geometric-patterned wall in the background
Person riding a bicycle on a city street with blurred motion effect

Ultra-light titanium frame & components

Built with over 150 weight-saving parts, the T Line is significantly lighter than steel models. Carbon components and precision engineering improve ride feel, efficiency and portability.
Close-up of a Brompton T Line frame on a blurred background

Ceratech ceramic finish

Ceratech protects, but it also embellishes. The matt metallic colour is deep, yet you can still see the beauty of the hand-welded titanium frame. When you lift your bike, it feels wonderful to touch, like velvet metal.
Person holding a folded Brompton T Line bike against a dark background

Just as compact

4-speed gearing system expertly designed to fit neatly inside the fold, and weighing from just 7.95 kg.

Detailed information

Category General Info
Weight From 7.95 kg
Speed 4-speed
Material Titanium
Folded Size 25.4" (H) x 23.6" (W) x 12.6" (D)
Number Of Gears 4 gears
Previous Model Name T Line - 4-speed
Category Frame
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 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
Seatclamp Machined aluminium seat clamp and rear frame clip in anodized matt black finish
Hinge Clamps Machined aluminium self-aligning hinge clamp levers and plates anodized matt black finish
Category Cockpit
Grips Superlight lock-on foam grips
Shifters 4-speed trigger shifter
Category Seating
Seatpost Superlight standard seatpost (33")
Saddle Superlight Carbon
Category Drivetrain
Pedals Superlight cnc aluminium pedal set with fixed right-hand and quick-release left-hand pedals
Drivetrain Brompton 4-speed drivetrain, 163% range
Chainset Superlight carbon crankset with hollow BB30 axle, integrated spider, 56T chainring and chainguard
Bottom Bracket FSA Mega Evo Bottom Bracket
Sprockets 11-13-15-18 tooth
Derailleur Patent pending direct mount 4-speed derailleur
Category Wheels And Tires
Rear Wheel Lightweight rim, double butted spokes, aluminium hub body and 4-speed freehub body
Front Wheel Lightweight rim, double butted spokes and aluminium hub with sealed bearings and allen key axle
Tyres Schwalbe ONE with Addix Race rubber mix and V-Guard puncture protection
Tubes Tubolito S-tubo 34g tube with presta valves
Category Brakes
Brakes Dual Pivot Calipers
Category Accessories And Utility
Mudguards Included
Lighting Reflectors
Pump Not included
Rack Not included
Front Carrier Large diameter front carrier block adaptor for all types of Brompton luggage
On Bike Accessories Not included