I think mine are 305s all they way around...

I had 24s on my 2/4 but had a 275/30 u can run a 305/30 24 n be just fine.. maybe a slight rub at full lock rim width n offset have more to do with it then Wheel diameter does. My truck is bagged on 24s now and no rub at all just had to roll fenders in the front the back is a whole different story