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Brompton G Line - Medium - Forest Green

Brompton G Line - Medium - Forest Green

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Brompton G Line - Medium - Forest Green
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£ 2,599.00 £ 2,599.00 (Tax included)

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Brompton G Line - Medium - Forest Green

The G Line - Gravel? Line range was introduced by Brompton with the 2024 lineup of bikes

It has larger wheels than the traditional 16 inch Brompton size at 20 inches

The G Line is available in three sizes:

  • Small
  • Medium (this one)
  • Large

and is available in four colours:

  • Adventure Orange
  • Traildust White
  • Forest Green (this one)
  • Space Black (new for the 2026 model year)

Brompton G Line - Small - Forest Green specification:

1. Frame
Main frame: Steel
Rear frame / triangle: Steel
Handlebar stem: Alloy
Front forks: Alloy


Folded size: 71cm wide x 68cm tall by 38cm deep (approx)

2 Colour
Main frame: Forest Green
Rear frame / triangle: Forest Green
Handlebar stem: Forest Green
Front forks: Forest Green
Decal: Green
Detailing: Black

3. Size

Medium (also available in Small and Large)
The G Line only has one handlebar type - ride position is dictated by the stem length and seat post length
Handlebar width - 65cm

4. Gears / drivechain

8 speed Shimano Alfine hub gear system
54T front chainring - black (we can change to 50T or 44T if you would like lower gearing for easier hill climbing)
20T single rear sprocket
Brompton advance chain with connecting link - 114 links
Brompton flat platform pedals (the right one is removable)

5. Front luggage system

The G line comes with a front carrier block fitted 

6. Mudguards / Rack

This bike comes with black advance mudguards and rack

7. Roller wheels

Large roller wheels help keep the bike stable when folded 

8. Tyres / Wheels

Schwalbe G One with tan wall (ETRTO size 54-406) - tubeless ready
Low rolling resistance and good puncture protection 
20 inch wheels

Tektro / TRP Hydraulic disc brakes
140mm centre lock rotors front and rear

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

Presta / racing type valve - 6mm diameter

9. Saddle

Brompton saddle with mount point under saddle for Brompton Be Seen light / Brompton Cateye Mini / VIZ 150 rear light

10. Seat height

Extended length seatpost

A Brompton saddle height insert is included - we recommend that you only after riding the bike for a while

11. Suspension

Along with the new G Line comes a new advance suspension block

12. Lighting / reflectors

Front and rear reflectors are included
It's easy to retrofit battery lighting