We installed General Grabber HD 195/70 - 16 tires on the 4" rims. We would have preferred a 185 section tire but could not find one with a reasonable outside diameter that would fill the opening in the fenders.
There is some crown to the tread and the sidewall bulge is more noticeable than you normally see. It could be an issue on a truck that would see lots of highway miles.
We are pleased with the results and feel they will work great for Steve, the owner.
If we could find an inexpensive set of 4 1/2" rims we would consider swapping the tires to them. That extra 12 mm of wheel width would improve the fit quite a bit.
Thanks for the help.