27″ or 28″ tires???

I’m looking to retire my hole shots and thinking about getting zillas for a light all-around tire. Right now I can’t decide on 27 or 28". Will I have any fittment issues running 28’s on the stock beadlock rims? I hear they run a bit small. I plan to add 1.5" wheel spacers. I also have the fender guards installed.

Thanks!