C rated tires too light for a 4x4 Van?

[cstamm81]

So I have an 87 Dodge Quigley 4x4 van with 15x8 steel wheels and some crappy MT's. It looks like all they sell in a 33x12.5x15 tire is a C rated tire. Question is, are these rated too light for a full size van? Trying to stay on budget, but I would upgrade to 16" rims to be able to run E rated tires if it is absolutely necessary. Thanks in advance.

[IdaSHO]

At first glance, I would say stay away from such a light duty tire.

but until you post the actual LOAD INDEX of said tire size, it is all just speculation.

[cstamm81]

These are the two tires that are in contention at the moment:

http://www.discounttiredirect.com/di...sw=false&cs=33

http://www.discounttiredirect.com/di...sw=false&cs=33

Each link has a product details screen if you scroll down. Perhaps I don't understand tire ratings, it just seems odd that there are no D or E rated 33" tires in a 15" rim. After all, 15" rims ruled the roost for a long time.