All the '68 deluxe wheels cracked eventually. Mine was cracked by 1969 so a Pontiac dealer replaced it with a new one under a recall or warranty. I don't know if the replacement is the "improved" one they mention in the recall but it didn't take long for it to also crack. It's the one on my car now.
Interestingly, GM blamed it on the owners. ________________________________ Edit: I recalled a discussion with examples of two different deluxe wheel designs so I looked for it. The warranty wheel on mine now, a dealer replacement, is cracked but nowhere near as bad as some in pictures in various discussion posts in this forum.
