Hey, I do I do, I've got Cooper Discoverer HT+ in the stock size.
I've got about 13000 miles on them and they still look new. They are quiet, handle good and give a smooth ride. Our truck spends most of it's time pulling our 6000lb travel trailer and the tires seem up to the work load. The tread pattern is pretty nice looking (as far as tires go) and come with plenty of siping.
In wet weather I haven't had any scary sliding or hydro-planing problems, but I can break the rear tires loose when accelerating away from a stop if I give it a little extra gas. Surprisingly, I can feel a little tire spin when I give a little extra leaving a stop in the rain with the trailer in tow.
In the snow, in 2wd, the Hemi power and light rear end is no match for the tires, I can drift all day long. Put it in 4wd though and the truck behaves very civilized. It accelerates very smoothly with good grip, and holds the line in the corners. I suspect it has more to do with the 4wd system than the tires, but still, it's like night and day once you twist that knob on the dash.
My truck, being a TRX4, came with 17" wheels and Goodyear Wranger ATS (?). I didn't like these tires much, squirmy on the road, noisy, easy to spin in the dry, forget the rain.
I have Michelin LTX M/S on my Suzuki XL7, great tires and looked into them for the Ram. At the time they ran close to $300 a tire where I got the Coopers from Discount Tire for $173 a piece.
Besides price, one of my other concerns was a good tire for towing. The oem Goodyear HP are P tires, car tires with soft sidewalls for better ride. LT tires are truck tires, stiffer sidewall, better for the heavier loads, but worsen the ride, decrease mpg and tend to cost more. The Coopers are an XL tire, somewhere between a P and LT tire, so a little stiffer to better handle more load, but not too stiff, so ride is still good.
Beside the wheel spin in the rain, I can say that I'm very satisfied with these tires, especially for the price.
