127mm (5") x 50mm Big Inflatable Rubber Wheels for 4mm Axle (2 Pack) from Du-Bro - 500RV
Note:  These wheels will not fit nor work for a beach cart or wheel chair.  
Features:

Realistic Bolt-Together Hubs
Smooth Inflatable Tires
Positive Seal Air Valve

Includes:

Two Wheels
Two Wheel Covers
Two 5\/32" Collars
Two Wheel Cover Screws
One Air Valve

Requires:

Pump


 
  WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go to www.P65Warnings.ca.gov.