Replacement ring shims. Ring shims are needed to mount up thin beaded tires.

HPI: Dirt Bonz, Dirt Claw
Losi: King Pin
Imex: Swamp Dawg, Claw Dawg, Dirt Dawg, Rib Dawg, Baja, Road Dawg, Pin Dawg & Trail Dawg
ProLine: Maxx Bow Tie, Maxx Road Rage, Maxx Paddle, Maxx Mulcher, Badlands, Crimefighter MT, Holeshot MT