They’ll clearance themselves.From what I'm seeing, 245 40 17 RT660's are same width as 255 40 17 V730's, but smaller diameter, which should help with acceleration and feel.
Or I could do 255 40 17 RT660's and hope they don't rub. Fat chance though.
I think I could have done the 255/40 instead of the 255/35, but overall I’m happy with this size.