I don't see how thats possible without a notch... I have set of 28x9's on a set of 15x7 factory monte ss wheels with 3.5" of b/s and I needed a 7/16 spacer. I have more room now out to the wheel lip than I do to the frame. If I ran more of a spacer I could maybe get the 10.5 under there but it would be really tight and there wouldn't be much room for tire growth...