Cooper Discoverer® Stronghold™ AT

[TCFD40]

What offset are your running?

Black Rhinos are a -18. Love the tires so far. Was running Yokohama G003s for the last 2 1/2 years.

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[TCFD40]

Just got home from running the 16 Creeks trail in eastern KY. Listed as a 4/10 on On X Offroad. Steep climbs of gravel, mud, and snow. Multiple areas of rock, large mud/water holes, some which had hidden medium to large rock. 16 water crossings of varying depth with the deepest, by my estimate, at 24” or more. All crossings had varying size rock, and varying angles of entry/exit. Aired down to 15 psi prior to entering. These tires performed flawlessly. Never broke grip, or even seemed as if they were going to slip. No signs of any chunking or abnormal damage/wear to treads. At this point I would have to say the Cooper Stronghold AT’s have exceeded my expectations, and are very worthy of consideration. I just hope they expand the sizing to include larger sizes. Would definitely love to have these in a 37” size or bigger.

 

[TNriver]

The long awaited shipment with my wheel and tire combo finally showed up. I got everything bolted up with a small hiccup from some weights that came off during shipping. I went and had that taken care of locally. I then completed the 6MT relearn procedure for the larger tires and changed the TPMS and wheel size settings with my Tazer mini. I installed Cooper Stronghold AT LT285/75R17 (33.9") on Method 703 wheels +25mm offset. I drove it about 155 miles and really like the way it drives at 31psi for Load Range E. I drove back roads and then some interstate speeds up to 78mph. They ride smoother than the factory KO2s in my opinion with bigger tread gaps for offroad. I have New Falken At4Ws on my truck and I think I like these better. They are more aggressive than my AT4Ws and KO2s. The Strongholds are a little louder than the Falkens but seem quieter than the KO2s.

 

[TNriver]

Oh, I also weighed the stock spare tire LT285/70R17 at 76.8 lbs on my digital scale, then weighed my new wheel and tire combo LT285/75R17 at 85.25 lbs.

 

[Minimaxed]

Glad to hear from someone that's had both these and the AT4Ws, haven't seen any comparisons of them yet, but I'm glad the strongholds are better in your opinion.

I chalk tested mine to get the right pressure and found 31PSI was the sweet spot.

 

[jeepable]

I just bought the Cooper Strongholds last week and so far they are great. I replaced 31" General Grabbers with 33" Coopers. The shop filled them to about 40 psi, but I plan to drop that today to 35-36 and see how it goes. In general, I'm pleased with how they have felt for the first 500 miles or so. Let me know if you have any questions.

 

[luisnjulie]

I just bought these Cooper strongholds to replace my 6 month old Falken wildpeak at4w.

I have a 2025 Willys with the Rubicon suspension from factory, all Willys after 2024 come with it.
Falkens have lots of tread left, 16/32, they're 285 70 17, C load rating, 6 ply and 3 ply sidewall.
They're very good looking, very quiet, on pavement, great in rain, rocks, gravel, overall a good tire, BUT! They are terrible in the snow/ice/cold, just like a mud tires would be, had them aired down to 28 and still sucked. I honestly don't understand how they earned the 3 peak rating, horrible is an understatement. You need to run dedicated winter tires if you go with these falkens AT4W.
And they're heavy, for a C rated tire, heavier than other E load rated ones.

Now, I purchased the Cooper's on sale at Canadian Tire, but went a size bigger this time. 285 75 17 and E load rating and so far love them. They look really good, they're even better in the snow and ice than my toyos at3 I had a year ago, they're lighter than the falkens and believe it or not give me a bit better mileage than the falkens. However they are noisy, almost as noisy as a mud tire, but it's a jeep, everything creaks and makes noise plus it's not the best insulated cab out there. The noise doesn't bother me at all, but if you're looking for a quiet tire, they're not for you.

I do recommend these coopers, especially if you live up north and get winters like here in the Alberta Rockies.

 

[WXman]

Anybody having balancing issues with these? A friend installed them on his wife's Gladiator at my suggestion last month, and they've had a nightmare of a time trying to get vibration out of them.

 

[TNriver]

Anybody having balancing issues with these? A friend installed them on his wife's Gladiator at my suggestion last month, and they've had a nightmare of a time trying to get vibration out of them.

Mine ride better than stock K02 in my use case.

 

[luisnjulie]

Anybody having balancing issues with these? A friend installed them on his wife's Gladiator at my suggestion last month, and they've had a nightmare of a time trying to get vibration out of them.

Not me. They did the road force balance and they're good

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