10/4 on what you found on the internet. I found the exact same thing. I have now located in a little town called Monks Corner a company named GCR Tire who has the Hankook 275/75 - 22.5 for $320.23 each taxes included. $30 to mount and $25 to balance. Seems to be a good price especially up against Goodyear and Michelins.
Further investigation into the technicals of tires and they must meet DOT tech standards. So that said the AH12 is a 16 ply rated, H series tire load tire. Don't know the warranty particulars yet but I would only assume they are equal to (worthless) or better than Goodyear.
Will post when I find out.
Biggest issue with tires particularly front steer tires is that they are in the line of fire for all the negatives. 1) they will hit every pot hole which can do eventual damage to the tire, 2) tire pressures are essential to long term wear, 3) alignment, and usually only toe can be set on the class A rigs, 4) shocks - which tend to show up in across the tread cupping, 5) last but not least the elements - especially ultraviolet light - i.e. the sun. AGE is a factor in that rubber no matter who processes it simply deteriorates with time. 5-7 years is typical. In that time zone lots of things can start happening and the tire manufacturers know this full well.
Anywho, good luck......jim
Jim and Karon Monaco Yacht Trekkers