Word to the wise...when pegs get really worn down from griding ledges their edges become sharp like razors. My right foot slipped the pedal coming in from one of the wallslaps pictured below and my bike went forward on me allowing my peg to slash my right ankle area. I ride the MacNeil Ti pegs and they are so sharp that they cut through the top of my shoe, sliced my ankle open, and ripped my pants. OUCH!
Moral of the story: file the edges of you pegs if they are sharp!