81 Custom Grind Peg The ultimate in strength 81 Custom Pegs have the edge in the peg market. Designed to fit nearly any scooter, Razor, JD Bug, Grit, Madd Gear (MGP) and many more, they can be fitted in just a couple of minutes! 81 Custom pegs have an innovative design which makes them super strong . This is because the peg is the nut and is threaded onto the end of the axle which is the bolt this reduces the risk of shearing. Please see video for fitting instructions on Technical Information tab below.