I currently am running Goodyear Duratracs in 31570R17 and have been very pleased with them. Quiet on road and do well off-road. I was wondering, if I were to go to 37s what tire would you recommend that would fall close to a Duratrac since they don't make them in 37s. Something like a very aggressive AT or mild MT. Can't say that I have been able to find anything in a 37 that is similar to the Duratracs...yet.