Brompton C Line 12-speed Mid - 1975 Edition

1. Frame

All steel:

• Steel Main frame and stem
• Steel forks
• Steel advance rear triangle introduced in 2025
• 1975 edition serial plate

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

2. Colour

• Main frame: Thermal fade finish
• Handlebar stem: Thermal fade finish
• Forks: Disco silver
• Rear Triangle: Disco silver
• ColourLab touchpoints: Gold

Decal: Brompton 50 logo and monogram details
Detailing: Black
Serial number plate: Special 1975 plate

3. Handlebars

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

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 - 1975 edition gold anodised cranks
106 link Brompton advance chain with connecting link
Folding left 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 so you can easily add Brompton luggage to make transporting your stuff easier without affecting the ride 

6. Mudguards / Rack

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

7. Roller wheels

New advance roller wheels help keep the bike stable when folded 

8. Wheels / Tyres

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

Black Hub / rim (the braking surface is still silver) with silver spokes

• 28 spokes  on the rear
• 28 spokes on the front
• Bolt through hubs

Continental contact urban tyres - creme wall
Low rolling resistance and good puncture protection 

Schrader / car type 8mm valve 

9. Saddle

Special Brompton 50th Monogram Saddle

The Brompton saddle is attached to the seat post using an adjustable Brompton Pentaclip - black

10. Seatpost / Seat height

Standard seatpost for riders with an inside leg measurement of up to 33 inches - colour: black

Note: If you are a taller rider - up to 35 inch inside leg - then an extended length seatpost can be fitted at no extra cost at time of ordering - just let us know

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 advance rear triangle comes a new advance suspension block

12. Lighting / reflectors / accessories

Front and rear reflectors are included

It's easy to retrofit battery lighting (at an extra cost) such as

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

The bike comes with some special luggage:

• 50th Monogram Bottle Holder - to follow 
• 50th Monogram Small zip case - to follow