I tried searching no luck! Tire size?

I read some where here that for on road to stay at a certain diameter? 24" 26" ? How tall will the motor handle?

What about off road? I plan on a 2" body lift and have already used my ATV tires 26 x 12-12 on back and 26 x 8-12 on front!
Will I be able to go to 30" x8 -14's all the way around

 

I've never tried that tall of a tire. Let's us know how it works.