They do not have the 3-ply sidewall; the ones I've seen have p-rating, which means 2 ply all the way around. There's nothing wrong with that, though. The only radials I know of that have the 3-ply sidewalls are BFG ATs/MTs and Goodyear MT/R's. Just make sure you have road hazard warranty. They seem to be very good, and look a lot like Pro-Comp's AT when mounted.

Sounds like you got a smokin deal. I guarantee they're more than 69 bucks each in CO.