Cooper Discoverer A/T3 megathread?

*Not my tire*
Anyone had issues with these tires? Friend from work was impressed with mine and bought some for his boys truck (Chevy) and texted me this pic today. He was running 33 12.5 15s

 

WOW, It kind of looks like something punctured it right about here

 

A quick deep winter update: It hit -20F for a few days over the weekend and through Christmas, and the 4S's have continued to have excellent performance. I've put about 3000 miles on them so far, almost all of which have been on ice and snow, and they've continued to improve (or I've learned their handling and adapted). Stopping traction on glare ice is still not as good as a premium studded tire, but it's about as good as a non-premium (i.e. not a Blizzak or Michelin X-Ice) studless winter tire. They've stayed round at -20F too which all-seasons can struggle to do as the rubber freezes and takes a while to thaw out leading to thump thump thumping down the road. Packed snow and fresh snow traction is excellent. Haven't seen much clear highway however, check back in April... ​

 

Yeah I saw that too. He texted me again and said he found a screw or nail hole in the tread and thinks most likely it was really low on air and that’s what blew it. My friend is a mechanic for 30 plus years and a automotive instructor now, his boy isn’t too vehicle savvy lol

 

Went out mudding tonight and holy shit these tires are great! We got close to 6” of rain 2 days ago and everything was pure slush with lots of standing water. Didn’t get stuck once, I did spin the tires quite a bit though, but they kept the truck going at all times.

Running the 285/75r16 XLT’s

Reminds me how badly I need to do a diff breather mod...

 

those of you running LT and XLT had any balance issues or steering shake issues?

 

None whatsoever with my XLT’s

 

Mine have been awesome. I had St Maxx and the dreaded right side/passenger side pull and I haven’t had anything even close to that on these, they feel great on-road

 

Finally pulled the trigger on my 4S. Went to my local Discount Tire in Riverdale, UT. They were awesome! Matched my Discount Tire Direct quote. Thanks, Matt, for all your help!

Went from Grabber HTS 255/70/17 to 265/70/17. I like the little bit extra tire so far. Just a quick drive so far but they are smooth and quiet. They will be in snow tomorrow.

 

4 day update on my 265/70/17 4S'...

I've been is the snow the past 2 days. In 2WD I have plenty of traction. With my previous tires, even 2 years ago when they had tread, I needed 4WD just to get up my street in the snow. I went up the street in 3 inches of cold, icy snow in 2WD with no issues with the new tires.

Awesome purchase. Totally satisfied so far!

 

Took the XLT’s off-road and they did great aired down to 18psi. I’m no rock crawler but these tires suit my needs very well. No complaints.
I have driven in HEAVY rain on the freeway multiple times and they performed without issue in those conditions as well.

 

That's what I wanted to hear!

 

I love my at3 LTs but I’m having a chopping issue. It’s a stock truck with no side to side pulling issues, it tracks straight caster camber seems good. Not sure what’s causing this. Anyone else deal with this?

 

I've felt some of that with my 4S'. More pronounced with concrete sections of freeway, where there are small grooves in the concrete. My wife's car did this with new tires and it went away. I'm wondering if its a new tire thing?

 

Thanks unfortunately they have about ten thousand miles on them and it seems to be a new thing. I describe it as chopping but it’s more of a scalloping of the outside edge of the tire not a noise or feeling. Too much pressure? They have 36 psi. Too fast cornering? Mostly highway and backroads decent amount of fast on/off ramps.

 

You might have to do chalk test to get correct pressure, your shocks can be worn causing a lack of dampening. Have you checked your alignment lately? Or is one side where in differently than the other?

 

They are doing it equally on both sides. I haven’t had an alignment but it doesn’t feel like it needs one, I want to avoid getting one if I don’t need it. It’s a 2016 with 52000 miles so shouldn’t need shocks

 

Good to hear. Thanks.

 

Fun times w/the XLT’s. Apologies for crappy pic quality.