Brompton C Line 12-speed folding bike

Brompton C Line 12-speed folding bike

The 12-speed version of the C Line was originally introduced in 2024 (replacing the 6-speed)

Gearing wise it uses 4 derailleur gears combined with 3 internal hub gears - which gives 12 speeds in total

Brompton C Line 12-speed specification:

1. Frame

All steel:

• Steel Main frame and stem
• Steel forks
• Steel advance rear triangle

Folded size: 585mm wide x 565mm tall by 270mm deep

2. Colour

Main frame: Choice of colours (Amethyst Lacquer is a premium finish which costs a bit extra!)
Handlebar stem: Colour to match main frame
Forks: Colour to match main frame
Rear triangle: Colour to match main frame
Decal: Depending upon main frame colour
Detailing: Black

3. Handlebars

There is a choice of three handlebar styles:

Mid rise / classic Brompton style bars (previously known as the M type)

4. Gears / drivechain

12-speeds in total - combining the 4 speed advance Brompton derailleur system with a 3 speed hub gear system
Derailleur chain tensioner
50T front chainring - black
106 link Brompton advance chain with connecting link
Foldingleft hand pedal - black
Non-removable right hand pedal - black
4 rear rear sprockets 
Integrated 4-speed gear shifter on left side of bars - black - for derailleur
Integrated 3-speed gear shifter on right side of bars - black - for hub gears

5. Front luggage system

The C line comes with the front carrier block fitted to allow for carrying of the Brompton luggage range, in turn allowing you to carry your stuff without affecting the steering of the bike

6. Mudguards / Rack

This bike comes with black advance mudguards
No rack / roller frame is included - though it can be retro-fitted

7. Roller wheels

New advance roller wheels help keep the bike stable when folded 

8. Tyres / Wheels

Marathon racer tyres - black / reflective
Low rolling resistance and good puncture protection 

16 inch (ETRTO size 349) wheels with double wall rim

• 28 spokes  on the rear
• 28 spokes on the front

The wheels have black hubs, silver spokes and black rims (the braking surface is still silver)

Schrader / car type 8mm valve 

9. Saddle

Brompton standard saddle - 147mm wide

This saddle features chromoly rails and the fixing point for the Brompton Cateye or Be Seen rear light 

10. Seat height

Standard seatpost for riders with an inside leg measurement of up to 33 inches
(If you are taller - up to 35 inch inside leg - then an extended length seatpost can be fitted at no extra cost)

For very tall riders a telescopic seatpost is available at extra cost 

Saddle height insert is included - we recommend you fit that after riding the bike for a while

11. Suspension

Along with the new C Line (with a MK 6 rear frame / triangle) comes a new advance suspension block

12. Lighting / reflectors

Front and rear reflectors are included

It's easy to retrofit battery lighting such as:

• Brompton Spanning solo rear light
• Brompton CatEye 500lm front light
• Brompton Be Seen light set

Even more info .....

You've really read all that - and made it all the way down here?

We made this video showing the features of the Brompton C Line 12-speed and comparing it to the P Line 12-speed and the C Line 6-speed

If you have more questions - please feel free to contact us for more C Line 12-speed information