I put 8 ply recaps on my Ercoupe once and it raised the plane about an
in. off the ground and even with no air in the tire,it would not go
flat.It did give me more prop clearance but a rough ride.I just did it
because my buddy told me that I would not have to worry about flats any
more and I have been alone on some strips with no help and had to put a
bunch of rags in the tire to get home.Not legal but it worked and I will
deny it later(smile)