A few people like
http://100dollarman.com/ sell used military tires.What i have read they are ok on road and suck off road.I would skip them they will ride rough they are designed to handle the weight of a armored h1 which isn't light at all.Not the answer you want but look at goodyear duratrac you can get them in 35s,Or toyo open country mt and those you can get up to a 40 depending rim size.