I just don't want to tear up the buggy with the rubbing. I might have to go to the 28 in mayhams they are a rounder tire.
I was gonna point out what Tracker just did, if you can put a heat gun to the part where it rubs and push it in.
I'll also point out I had 28" Mega Mayhem's. All around a great tire. I've since upgraded to 30" Mudder Inlaws and the difference is monumental. The gripping force is without question better. But what I was really surprised by was how inferior the Mayhem's rode on the street. You would figure with it being a smaller and lighter tire it would be smoother but its the opposite. It felt like you bounced around everywhere at low speeds, and my current setup doesn't. Perhaps the flatness of the Inlaws (much like your Moto's) makes it smoother idk.
One last thing, a lot of the guys who are running 30's on their Z8's kept the stock rims and didn't experience any rubbing issues. I changed my rims and did have rubbing issues. Had to do quite a bit of cutting to make it work. Something to consider.