Marathon 8" Swivel Caster with Pneumatic (Air-Filled) Tire 2.80/2.50-4-inch tire mounted on a rigid caster. 8-inch tire diameter. 10-inch overall height from mounting bracket to edge of tire. Pneumatic (air-filled) tire. Jag tread. Caster plate dimensions 4.0"x 4.5" Perfect caster for small equipment, carts, etc. 250 lb load capacity. Not for highway use.