The Cooper Discoverer AT3-XLT tires have come a long way in the 20 years since you had yours go south. I’ve had a couple sets of them for my TC and for our 2011 Grand Cherokee.
When we first started using them in 2012, they were very quiet until you got down to the last 25% of tread, at which time they began to sing in a poco a poco crescendo.
I think they had a lot of complaints about that.
The next generation of Disco AT3-XLT’s solved that problem.
I’ve had one flat, a blowout on our TC on a jeep trail in the Inyo mountains in CA. A sharp rock punched a 3 inch gash right through the sidewall with a big pop and hiss, even heard over the noise that our CTD puts out. We were running them @ 28 pounds and the sidewalls were particularly exposed. So, operator error.
The Discos have become the favored tire of rough road, expedition type campers. They are in a class by themselves with now many imitators barking at their success.
When the factory 32.2 inch Goodyear LT275/70R18 OWL A/T 3640 pound rated tires wear out, which by all accounts shouldn’t be long, we’ll install Cooper XLT AT3 LT 285/75R18’s. They’re 34.49 inches in diameter with a 4080 pound load rating effectively dropping our final drive ratio from 4.30 to 4.10 and increasing the sidewall height for lowering the pressure on sand.
Of all the different tires we’ve had on our Dodge Cummins (185K miles worth) hauling our truck camper, the Discos are the best all round tire for what we do, are quiet and deliver very good extended tread life, and good traction on a variety of surfaces.
Part of that is because the design has large lug area and small voids.
2020 Ford F-350 XLT FX4 4WD SRW SB SC 7.3L Godzilla Gas TorqShift 10R140 397 amps dual Alt dual batts Frnt Dana 60; Rr Dana M275 E-locker 4.30's 4580/4320/4066# payload 7243# curb wt. 11,300# GVWR 5-er prepped. 2020 Northstar Laredo SC, 12v compressor fridge, cassette, 320w Solar sub zero insulation.