Dan, CaptainQuint might be right at least they'd know and this should be fix if it's a production problem even thought you used them for the money you've paid this is still unaceptable for ITP to make tires that are not up to their name.

They might think at putting the tires a little thicker if it's a problem.

I would send them pictures just for the He11 of it.

I had a set of ITP 589 on a Rubicon with over 8000kms and no problems like that happen. I sold the bike and there was lots of thread left. 4000kms is not much.

My 2 cents I guess.
Tony