I'm running Nitto 325/70 All Terra Grapplers on a 16" wheel, which are actually 34" by 13". The Nitto web site lists them as being just a hair under 34", and 12.90 wide. They are a nice all terrain that perform great and wear great. No road noise what so ever. Off the street they do great. I was just out at Ocotillo Wells, and Superstition Mountain, (near Glamis). The wide tire did great in the sand dunes. No complaints. A mud tire it isn't, but all terrain is. I know 34's aren't the most common size, but they weren't priced too high. If I remember correctly, I paid about $188 a tire. Nitto is a name brand, so not too bad for a good sized tire. I hope this helps.
Big D