rear guards rubbing SL 245/40/18

[ben131185]

since putting short travel shocks in the rear to fix a bottoming out issue i have no noticed one of the rear tyres is scrubbing the guard on the rear.
It makes a pretty aweful sound when you hit a bump at 100ks and and rear end flexes.
I can see on the tyre where it has worn a bit where it makes contact, i can also see on the guard where it has touched.

I rolled the front guards a while back after they scrubbed but I never thought Id have an issue on the rear.

Anyone else experienced this?

Im thinking i might use a grinder to grind out the area thats fouling rather than rolling.