Dave Patrick are my favorite "light as air" tires. 3 inch and 3.25 inch are 0.7 ounces. Yes they are the foam type not good for asphalt but the hubs are as tough as nails. I pancaked my Edge in from a dead stick and the hubs did not crack (the plane is fine, just bent the gear). I also turned a 17 pound gasser sideways very hard at a good speed and did not crack the hubs (ran out of runway during a landing, whups). Man these things are light and tough. Dave Brown stuff is good too.