Whats the biggest tires that will fit ...help!!!

[mercer21]

Whats the biggest set of tires i will get on a 2004 ford explorer limited 4 whel drive, with a set of 18 inch offroad wheels and a road bully 3 inch strut spacers lift.....i am trying to figure out the biggest tire i can put on the 18 inch wheels with out scrubbing?

 

[JoeCool6972]

275/65/18... (32")
Which is the stock size for F150.
I am using the 20" stock size for F150, which is 275/55/20.

With my rims I had to do some minor cutting to the wheelwells, but all I had to do is trim off the curved area a little. But my offset is crazy, 12mm on a 9" wide wheel.

 

[Limited02]

Well, with the right backspacing and a sawzall, anything can fit

JoeCool6972 seems to have a better idea than I do about this so I am looking forward to pictures after it's all said and done!