geetman easy there bud i work for goodyear and im very very loyal <img src="/forums/images/graemlins/lol.gif" alt="" />. i have gsa's on my jeep and have yet to get a flat from a nail.i just fixed a flat but it was due to corrosion on the lumy rims and a bad valve,so i went ahead and done all 4.with that being ranger you stated that you just want a mild off road tire that you can use on road,in snow and such well here is your answer Goodyear Wrangler with silent armour. they are excellant on/off road tires that perform great in snow,rain,mud and quit on the highway. here is some info on them.
goodyear wrangler

50,000 Mile/80,000 Kilometer Tread Life Limited Warranty**
30-Day No Obligation Trial Period***
Nationwide Warranty Service
Off-Road Assistance Program
Online D.O.T. Registration
NEW Goodyear GarageÖ Program
now if you can find ANY truck tire with all those options by all means check them out as well. sure these goodyears will be expensive but look at what you are getting.
guys you have to remember he is wanting a tire for mild offroad use not something he car run in the mud halfway up his doors. Bj and a few others mentioned good tires as well. but dont get mixed up with the severe off rod tires like the micky thompsons,swampers and such.they all do very poorly on the road. i have heard good things about the yokohamas,and michelins though.
as for the tire size stick with the size you have