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Frame Sizes

How to choose your frame size

There are two methods to help you choose the right frame size.  The preferred method is by measuring your inseam / inside leg length. The second is by using your height.

1. Measure your inseam (preferred)

Your inseam is the distance from the floor to the highest possible crotch position. The easiest way to measure it is to:

  • Stand, without shoes, with your back against a wall and spread your feet 6-8″ apart.
  • Place a hardcover book between your legs and up against the wall, spine up. Raise it until snug against your crotch (this mimics your bike seat).
  • Have another person measure the distance from the top of the book (spine) down to the floor.
Minimum inseam Maximum inseam Frame Size
25” 27.5” 45 cm
27.5” 30.25” 49 cm
30.25” 33.5” 55 cm
33.5” 37” 61 cm
37” 41” 67 cm

Please note:

  • A suspension seatpost will effectively raise the lowest position of your seat by about 5 cm (2 inches). If you’re getting one, please reduce your inseam by 5 cm, and check if you need a smaller frame.
  • If your inseam is between two frame sizes, these are the rules of thumb:
    – If you’re a confident rider, choose the bigger frame
    – If you want your feet firmly on the ground when standing still, choose the smaller frame.

2. Measure your height

Frame sizes - Amsterdam Bicycle CompanyPeople with the same height may have a different inseam.
That’s why your inseam should always be leading when choosing your frame size.

What about the (e-)cargo bikes?

They are one size fits all. This is due to the fact that the angle of the seatpost is very different from a regular bicycle.


Please contact us if you have any questions. We’re glad to be of help.