Brompton C Line Folding Bike - 12-Speed

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.

Specification

Weight: From 12 kg

Number of gears: 12

Material: Steel

Folded size: 25.3" H x 23" W x 10.6" D

Main frame: Precision drawn heat-treated steel tubing with hand brazing and selected auto-brazed joints

Rear frame: Brompton Advance Rear Frame

Fork: Steel brazed fork

Grips: Lock-on grips with soft-compound rubber adhered to an engineered core

Seat post: Standard or extended

Saddle: Standard

Seat clamp: Composite seat clamp and rear frame clip

Hinge clamps: Composite hinge clamp levers

Pedals: Brompton Folding left hand and non-folding right-hand pedals

Drive train: Brompton 12-speed drivetrain, 402% range

Chainset: 6061 forged aluminium crank with 50T chainring and integrated chainguard

Bottom bracket: Square taper bottom bracket

Headset: Brompton headset

Shifters: Brompton 4 speed derailleur shifter & 3 speed hub gear shifter

Sprockets: Brompton sprockets - 11-18 Tooth

Derailleur: Patent-pending direct mount 12-speed derailleur

Rear wheel: Double wall rim, 28 spoke, Brompton Wide ratio 3 speed internal gear hub

Front wheel: Double-wall rim, 28 spokes laced to a Brompton front hub

Tyres: 349 x 35C Schwalbe Marathon Racer, a puncture resistant tyre with a reflective sidewall

Tubes: Schrader valve

Mudguards: Included

Lighting: Reflectors

Roller wheels: Advance Roller Wheels

Rack: Not included

Brakes: Brompton Dual Pivot Calipers

Front carrier block adaptor for all types of Brompton luggage

Model year 2026

There are three handlebar types, offering different riding positions for varying heights of rider and riding styles.

Low: A straight handlebar. Ideal for those who like to race about town and have experience of riding Brompton bikes. The bar gives the bike a sporty feel.

Mid: A riser style handlebar. The most popular handlebar type, it creates a relaxed neutral position for most riders. For smaller rider a mid bar provides an upright dutch bike position.

High: A riser style handlebar with a longer stem. The high bars create a Dutch bike position putting the rider very upright. The high bar is ideal for taller riders who want a relaxed feel.

Handlebar: MID, HIGH; Colour: DUNE SAND, CLOUD METALLIC, RED PLUM