I just upgraded to some late model 16x7 8 bolts to get away from the original GM 15x5 split rims (no body wants to touch them in my town). I went with Firestone's Transforce LT215/85-16. Right at 30" tall...the 235s were too tall almost 32". I also wanted more of a truck pattern...these somewhat have that look but also had the very plain sidewalls I was looking for. I'm hoping to make this my daily driver so wanted to go the way of radials.
If you find a tire you like check tire rack or simple tire for the specs on acceptable rim diameter.