Originally Posted by Chrisboulden
I thought the middle number was the aspect ratio/sidewall height? Yes i was wondering how much lift that would give me 1in,2in,etc?
You are right.
A little over 1"
275 * (.65-.55) * 2 / 25.4 = 2.17" difference in overall diameter, only half of that will raise the axle.
New overall diameter is around 34"