The Acerbis X-Grip frame guard serves a dual purpose. First, it allows the rider to protect the frame of the motorcycle from wear. As a frame protector, it keeps the bike in better condition over time. But the genius of the Acerbis X-Grip frame guard comes in adding a second purpose: grip. Thats right, not only does the X-Grip serve as an excellent frame protector, it also makes it easier for a rider to hang on to the bike. As the name implies, its a frame guard that adds more grip for the rider. The Acerbis X-Grip frame guard is made from a dual-injected mould, and thats where the key is. The outer plastic is durable polycarbonate thats what allows it to serve as an excellent frame guard. Meanwhile, the inner plastic is much more pliable (though still durable), and this is the piece that.