i had a 6 month old p4de and the tires are already half bald, is this normal. also i need christmas ideas and i came up with tires and wheels,i will get rpm claws or revolvers, but it depends on what tire for the wheel type.i want to use the old tires for putsing around in the yard, but these new tires and wheels wil be used in snow,mud,gravel,water, and anything else.i mite throw in the idea of a sandpaw but does anyone know how fast they wear on mud,snow, or dirt? i like the sand paws for snow, but that seems to be my only use for them unless i break a wheel and need a backup set of wheels tires. i need to decide fairly soon so i can notify my family what i want.plz help me to pick the rite tire guys, i know you will!