28" Tire to rocker clearance - Duster

I have 28 inch tires on my dart. It was close when installed them but I thought it was okay. At around 105 MPH the tire grew enough to rub slightly. These are MT drag radials by the way. I then made a spacer to move my rear end back. I too have the MP offset spring hangers. After the small spacer I am now good to 120 MPH with no rub and that is as fast as this dart will go for now. Hope this helps.