If you go to TireRackdotcom, go to a brand and model of tire, and click on specs it will bring up a list of all sizes for that tire with height, width, weight, etc. Once you have what you need, look up the part number at DTD to purchase.
You can convert the communist size to real measurements fairly easily.
Width=first number diviced by 25.4 Example: 255/25.4=10", 285/25.4=11.2", etc.
Height is more involved. After you have done the width above, multiply it by the second number and divide that number by 50 and add the rim size.
For a 255/75/17 it would be 10"x75/50+17=32"
2012 Silver Sport S, Silver, 6 speed, soft top, 3.73s, LSD, PCG, Infiniti, deep tint windows, Pro Comp 1028 wheels, 33" Duratracs, Smittybilt bumpers and steps, KC fog lights, Mopar slush mats and fuel door.
Happiness is a belt fed weapon.