These are Inflatable Big Wheels by Du-Bro.
FEATURES:
Realistic Bolt-Together Hubs Smooth Inflatable Tires Positive Seal Air Valve
YOU WILL RECEIVE:
Two Wheels Two Wheel Covers Two 5/32 Collars Two Wheel Cover Screws One Air Valve
REQUIREMENTS:
Pump
SPECIFICATIONS:
diameter: 152.4 mm (6.0) width: 63.50 mm (2.50)
COMMENTS:
Replacement Air Valve (DUBQ0809) jmm 3/27/02 ir/kh