SlipStick 2 in. Floor-Protecting Rubber Office Chair Caster Wheel (5-Pack) CB680 - The Home Depot
6 Inches Heavy Duty Rubber Caster Wheels Anti-Skid Swivel Casters Wheels with 360 Degree for Set of 4 (2 with Brakes& 2 Without): Amazon.com: Industrial & Scientific
10 in Wheel Dia., 2 1/2 in Wheel Wd, Flat-Free Solid Rubber Wheel - 1NWZ6|1NWZ6 - Grainger
Rubber Wheels: Capacity Range: 200 - 3000 lbs. Hamilton Caster
Amazon.com: Vergo Solid Rubber Wheels 2-Pack Heavy Duty Flat Free Dolly Replacement Wheels - Threaded Rubber Tires Hand Truck Tires 10" x 2.5" with 5/8" Axle Bore Hole, Centered Hub : Industrial