Are they 23x8.50? 12x7 I think a guy I know has a couple 12x7s

I was told that with that rim and tire size a timed deck wont fit?

Based on the clearance between the deck wheels and the side of the rear tire, if you go with a tire wider than a 12-6, it looks like the deck wheels will hit the tires. Maybe you can swap the deck wheels or brackets left to right to gain more tire clearence, but not sure it will be enough, I have never tried.

Bill