If you have a Phantom kart for your young driver, the factory Phantom reversed pedals work great for helping him achieve full pedal extension without using extensions. I was going to use pedal extensions on the standard pedals then I noticed that the Phantom website listed reversed pedals, so I thought I would try them. They work great for my son, and I did not have to shorten my throttle or brake rods. As he grows, I can shift back to stock pedals again.