Bike helmet broke. Not sure how it happened. Thankfully my LBS had the replacement "mindset" part available. Unfortunately, the wheel used to tighten the strap was not the same color(vain I know.) This was an easy swap. I removed the two screws holding the wheel in place. Popped the old one out. Did the same on the replacement part. Put the color-matched wheel on and reinstalled the two screws. Removed the broken mindset from the helmet and put in the new one. Super easy and I am happy!!