[Beastmaster]

Can you tell us specifically which Swamper you got?

There are a few reasons why I ask. One of the primary ones is to make sure that you have one that fits the load range of the H1.

Without looking at what you've got, it's likely that you've got a balance issue still.

The major thing about Swampers is that their balancing dynamic changes so much at highway speeds. Many shops can't do a good balance job for trucks beyond 35's.

The other thing to look at are out of round Swampers. This has happened. Some shops will shave the tires round.

Also make sure that the tire shop balances the rim out first before they put the tire on. This helps a lot!