Grimmnir

I recently fitted rota 18 pwr's to my blobeye. They are 9.5's and although the tread is not visible from above the arch, the rear arches do contact the side wall on a big bounce or under load I suspect.
My mate assures me this will be corrected with rolling the arches. I just wanted to know if there was any other issues I should be aware of before we begin.
Thanks