The Brompton C Line 12-speed is the ultimate city companion, blending iconic British craftsmanship with cutting-edge portability. Proudly handmade in London since 1975, our bikes transform from a full-sized ride into a compact, locked package in under 20 seconds. Whether navigating bustling streets, hopping on a train, or tucking it under a café table, the C Line is designed to move with you effortlessly. Now featuring a new 12-speed system, it delivers an impressive gear range—matching, if not exceeding, traditional road and commuter bikes—all while maintaining Brompton’s renowned compact design. The Advance Rear Frame takes portability even further, allowing riders to glide and steer their folded bike with ease, thanks to larger, smoother-rolling wheels.
Personalisation has always been at the heart of Brompton, and the C Line 12-speed continues this tradition with three striking new colours: Cloud Metallic, Palm Green and Plum Red. Its unique Brompton Luggage System ensures a stable ride, even when carrying heavy loads, by keeping weight on the frame rather than the handlebars. Whether you're commuting, adventuring, or simply enjoying the ride, the C Line 12-speed is a versatile, stylish, and practical bike that redefines urban mobility.
Weight
From 12 kgSpeed
12-speedMaterial
SteelFolded Size
25.3" H x 23'' W x 10.6'' DMain Frame
Precision drawn heat-treated steel tubing with hand brazing and selected auto-brazed jointsRear Frame
Brompton Advance Rear FrameFork
Steel brazed forkGrips
Lock-on grips with soft-compound rubber adhered to an engineered coreSeatpost
Standard, Black (33")Saddle
StandardSeatclamp
Composite seat clamp and rear frame clipHinge Clamps
Composite hinge clamp leversPedals
Brompton Folding left hand and non-folding right-hand pedalsDrivetrain
Brompton 12-speed drivetrain, 402% rangeChainset
6061 forged aluminum crank with 50T chainring and integrated chainguardBottom Bracket
Square taper bottom bracketHeadset
Brompton headsetShifters
Brompton 4 speed derailleur shifter & 3 speed hub gear shifterSprockets
11-18 ToothDerailleur
Patent-pending direct mount 12-speed derailleurRear Wheel
Double wall rim, 28 spoke, Brompton Wide ratio 3 speed internal gear hubFront Wheel
Double-wall rim, 28 spokes laced to a Brompton front hubTires
349 x 35C Schwalbe Marathon Racer. A puncture resistant tire with a reflective sidewallTubes
Schrader valveMudguards
IncludedLighting
ReflectorsRoller Wheels
Advance Roller WheelsRack
Not includedBrakes
Brompton Dual Pivot CalipersFront Carrier
Front carrier block adaptor for all types of Brompton luggageOn Bike Accessories
Brompton BellDisclaimer
* Specifications are subject to change without notice