Brompton Size Guide
Brompton Folding Bike Sizing
All Bromptons come with a standard frame size, with bike fit adjusted by seatpost length and handlebar rise (or stem length for G-Line models). Traditional Brompton handlebars are available in low, mid, and high options, allowing you to choose between a more aggressive or relaxed riding position.
G-Line bikes are sized S, M, and L, with seatpost and stem lengths tailored to suit different rider heights. For more details on finding the right fit, see the size tables below.
C Line, P Line & T Line - 16" Wheel - Sizing
You can get your perfect fit on a Traditional 16" wheel Brompton by adjusting the seatpost and choosing a low, mid or high rise handlebar.
Seatpost
The seatpost on a Brompton offers a high level of adjustment so you can get your perfect fit however tall or small you are.
The Standard seatpost is fine for most riders, but those who are a little taller will be better off with an Extended or Telescopic seatpost.
Use your inside leg measurement to determine which seatpost is best for you.
|
Seatpost |
Inside Leg (Centimetres) |
Inside Leg (inches) |
|
Standard |
Up to 84 |
Up to 33” |
|
Extended |
84 - 89 |
33” – 35” |
|
Telescopic |
Over 89 |
Over 35” |
Handlebars
There are three different handlebar options for traditional 16" wheel Bromptons.
Low - a flat handlebar that offers a sporty riding position. Shorter riders will find this option offers a regular riding position while taller riders will feel more tucked.
Handlebar height is 924mm.
Mid - a riser handlebar that offers a medium-upright cycling position. For most riders the Mid handlebar gives you that classic relaxed Brompton feel.
Handlebar height is 1015mm.
High- a riser handlebar with a high stem that offers a more upright cycling position. Taller riders will find this position relaxed. For others this High handlebar version offers a similar feel to a Dutch bike with minimum pressure on the hands and wrists.
Handlebar height is 1072mm.
G Line - 20" Wheel - Sizing
The Brompton G Line bikes are sized S, M, L, with seatpost and stem lengths for each size matched to specific rider heights.
Brompton G Line Size Chart
See the table below to find your Brompton G Line size.
| Bike Size | Height (cm) | Height (feet & inches) | Stack | Reach | Seatpost |
|---|---|---|---|---|---|
| Small | 152 – 168 cm | 5’0” – 5’6” | 676mm | 474mm | Standard |
| Medium | 168 – 183 cm | 5’6” – 6’0” | 687mm | 481mm | Extended |
| Large | 183 – 198 cm | 6’0” – 6’6” | 696mm | 502mm | Telescopic |
Brompton Electric Sizing
Electric C Line & P Line - 16" Wheel
Sizing for the Brompton Electric C Line and P Line is the same as for a regular 16" wheel Brompton. Get the right fit by adjusting the seatpost and choosing a low, mid or high rise handlebar. See C, P & T Line chart above.
Electric G Line - 20" Wheel - Sizing
As with the regular 20" wheel bikes the Brompton Electric G Line bikes are sized S, M, L, with seatpost and stem lengths for each size matched to specific rider heights. See G Line size chart above
