Front tire dilemma

You're at just over Ø 26". Anything bigger is where the problems start.
I'm measured them today after reading this post this morn., they measure 25 3/4" tall. I have an 1 1/2'' clearance in front of them and 2" behind them. Could run 27" easy, would like to have some that are liter than my 205 radials tho..