I am gonna go with 30s, unless my uncle gets a used set of 31s in for me to try out. I was pretty much set on BFG ATs 30x9.5R15, actual diameter 29.5". I really dont want them because they want to grab rocks and toss em, and suck in mud, but I know theres a trade off.
Most all of my driving will be onroad. Rarely going offroad (wish I had places to offroad..)
I really liked the Cooper Discoverer S/Ts,
![Image](http://vdoroge.ru/images/cooper/discoverer-st.jpg)
but wrote their 30x9.5R15 off becuase of the actual diameter of 29.35. Which is only a 1/8" differance rfom the BFG AT, and 1/16" in lift. So, its not a issue.
I like those because they seem to be a few bucks cheaper, Dont grab rocks, do well onroad, and have a open enough pattern to still do good in the mud. (which unless its been dry for a long time, theres always mud here).
This site here has reviews and what not, and its rated prety good in all catagorys, better in all catagorys except street by 1 star less then the BFG ATs.
http://www.offroaders.com/tech/AT-MT-Ti ... overer.htm
I also started eye balling the Cooper Discoverer STT.
They are 29.7" diameter, which I like much better.
They are actually rated as good, and better in some catagorys then the ST here, http://www.offroaders.com/tech/AT-MT-Ti ... er-stt.htm
But i figure ill lose some MPG, and have more road noise. The MPG is a deal breaker for me. How likely is it they will decrease my MPG some?
So, looking for any advice here. The Discoverer S/Ts will perform better then the BFG ATs from my reading, but are just a hair smaller. The STs will also work well in mud, and not pick up rocks. Plus the Coopers have deeper tread then the BFG
The STTs, while bigger, and just as good as the STs, will probably decrease gas milage and add more road noise.
Im thinking the Discoverer STs are my best option, ill just have to live with a tire just a hair bigger then the 235s on my truck now, but its a minaml differance between the BFG AT too.