I just wanted to say that these seemingly silly little inventions are probably one of the slickest little upgrades I have done to my Street Glide. They move the floorboard out up to an inch and what a difference.
Before I always found my boot kind of hanging off the outside edge of the floorboard but with the extensions on there, very slick. My foot is centered on the board and it made a surprising difference in the comfort of the ride.
If you want to check em out more closely you can here....
Harley Goodies.