[Beastmaster]

Let's get some terminology straight so we are all on the same page here.

A Runflat is an insert placed between the rim and the tire (on the inside) to buffer a flat tire from contacting the rim. It's like a tire within a tire.

CTIS is the Central Tire Inflation System. It's sole and only purpose is to adjust air pressure on the fly without getting out of your truck.

For Runflats - if you run stock rims, you can run ANY size tires you want, as long as they fit on the stock rim.

For CTIS - you can run any size rim or tire, as long as you have a connection to the CTIS hub connection at the center of the wheel assembly. Many times, you need to go with a custom CTIS hose setup from GT Products, which is owned by Dick Cepek (the man himself, not the former off road store chain that used to be owned by the same man).

Be aware that you should have a rim capable of handling load ratings of over 3500lbs per wheel. This will keep the safety margins in line with the weight of the truck plus load.

The stock aluminum one piece (made by someone, who I forget now), the two piece steel and aluminum rims from Hutchinson, and the GT Products rims are able to handle about 4500lbs per rim. The next closest that I would trust would be Walker Evans rims at 3800lbs per rim.

So, be careful as to which rims you get.

As for tires - Load range D or E (preferably E) is needed. The tires need to support at least 3500lbs per tire at max load.

Hope this helps,
Steve