Originally Posted by
B1KE
Thanks for the quick reply. What do the stem shims in the PDF do/ refer to?
Looks like tapered shims, that fits between the steerer tube and the stem.
It changes the up/down angle of the stem. Gives a bit more flexibility in finding a comfortable setting for you, without having to use a different stem.
With a "regular" stem, you have 2 choices by flipping the stem over ... A or B
With shims you multiply the options, as shown by the red & blue lines.