Marathon 10" Swivel Caster with Pneumatic (Air-Filled) Tire 4.10/3.50-4-inch tire mounted on a swivel caster. 10-inch tire diameter. 12-inch overall height from mounting bracket to edge of tire. Pneumatic (air-filled) tire. sawtooth tread. Caster plate dimensions 4.0" x 4.5" Perfect caster for small equipment, carts, etc. 300 lb load capacity. Not for highway use.