1) PAY CLOSE ATTENTION NOT TO OPEN THE STIRRUP OR FORCE THE MOVING PART DURING REPLACEMENT OPERATIONS! There is a risk of compromising the safety mechanism.
2) Turn the stirrup upside down and unscrew all the 4 screws placed under the tread using the specific wrench included in the package.
3) Once all the screws have been unscrewed, you will be able to easily remove the grip plate from its slot.
4) Replace the old plate with the new one inserting it in its specific housing, then secure it by putting back the 4 screws under the tread, using the specific wrench.