Folding Bike Sizing
We define our sizes as follows:
Size S: You are less than 5'5" (1.65m) tall. We remove 3 inches (75mm) from the seat post and install a short stem (60mm x 5D).
Size M: You are between 5'5" (1.65m) and 5'10" (1.78m) tall. No changes are made to the Swift. The stock seat post (540mm) and stem (60mm x 35D) are used.
Size L: You are between 5'10" (1.78m) and 6'2" (1.88m) tall. We keep the stock seat post (540mm) and install a long stem (110mm x 25D).
Size XL: You are between 6'2" (1.88m) and 6'5" (1.96m) tall. We install a longer seat post (590mm) and a long stem (110mm x 25D).
We also get asked by customers how they can get a more upright riding position. There are a few ways to achieve this. The first is to use the shorter 60mm x 25D stem if not already doing so. A second is a set of bar ends. A third way is to add a set of riser bars. For a few customers who wish for a very upright riding position, we have done all three.
If you want to fuss with the micro-level details of frame geometry, feel free to check out the frame geometry specifications.