I am running 2 1/2" level kit from Hell Bent Steel on an 08 screw 4x4 and am ready to buy new tires. I want as much sidewall as possible as the stock 20" rims are so tall they make the tire look small. Problem is according to tire calculator 285/70 is 35.71 tall with 7.85 sidewall and 295/65 is 35.1 tall with 7.55 sidewall and 305/65 is 35.61 tall with 12.01 sidewall and 315/60 is 34.88 tall with 7.44 sidewall.

Which one?????????? I really don't want any rub but I do want as much sidewall as possible.

 

Nobody makes a tire in a 305/65/20. They do make it in a 305/55/20 though. And I'm 99% sure you're getting sidewall confused with section width. A 35" tall tire on a 20" rim is going to have about the same amount of sidewall no matter what the brand or size. Not a 5" difference like you posted.

 

Goodyear and Toyo make a 305/60/20. Probably some others too. But a 35 is about all you can do and depending on your wheels and backspacing you may have some rubbing.