Fine tuning side-to-side
When fitting the boot to the foot, as described in 1. we are actually “only” getting the best fit from foot to shoe, but there is no compensation for pronating or supinating, like you might be used to when getting a pair of running shoes. The shoe will compensate for your particular posture.
In speedskating this will not work because you are balancing on a thin blade. The your body, your foot will take it’s preferred posture and there is no counterforce which could compensate.
Therfore we need to adjust the blade to the boot, so the blade is exactly 90degrees to the ice.
We have 1°, 2° and 3° wedges at our disposal, so we are able to fit boot and blade exactly to everyones needs.