Cooper STT Pro vs Nitto Trail Grappler vs Toyo MT?

[3TV]

I want to change to 37x12.50R-17 tires on my 392 XR. Which of these tires is going to work better in the southern Rocky Mountains? Let me preface this with the fact that I own a few UTVs that tend to get used in good weather, so if I am using my Jeep there is a good chance it is either going to be sloppy wet or cold and snowy. I have used the Toyo Open Country MTs in this size on several vehicles in the past, and they have always been my go-to tire because they get better traction than other tires I have used, and they are bullet proof. But every vehicle I put them on tends to get a slight case of the wanders after installing the tires. It doesn't matter if it is a pickup truck or a Jeep. Part of the problem is just that they have tall soft tread blocks that are a bit squirmy feeling until they wear in. But in any case, I thought I might try something different this time. I've never used Nitto, or the STT pros, so would appreciate some advice there. I saw on another thread on this forum, while doing research, that the STT Pros weigh 9 lbs. less than the Toyos I am used to. I don't think the 392 cares about weight, so are they going to be a durable tire? Any thoughts would be appreciated.

Sponsored

 

[azwjowner]

I want to change to 37x12.50R-17 tires on my 392 XR. Which of these tires is going to work better in the southern Rocky Mountains? Let me preface this with the fact that I own a few UTVs that tend to get used in good weather, so if I am using my Jeep there is a good chance it is either going to be sloppy wet or cold and snowy. I have used the Toyo Open Country MTs in this size on several vehicles in the past, and they have always been my go-to tire because they get better traction than other tires I have used, and they are bullet proof. But every vehicle I put them on tends to get a slight case of the wanders after installing the tires. It doesn't matter if it is a pickup truck or a Jeep. Part of the problem is just that they have tall soft tread blocks that are a bit squirmy feeling until they wear in. But in any case, I thought I might try something different this time. I've never used Nitto, or the STT pros, so would appreciate some advice there. I saw on another thread on this forum, while doing research, that the STT Pros weigh 9 lbs. less than the Toyos I am used to. I don't think the 392 cares about weight, so are they going to be a durable tire? Any thoughts would be appreciated.

https://www.jlwranglerforums.com/fo...cooper-stt-pro-37x12-5r17-54-000-miles.80464/

 

[3TV]

That was good information. Thanks.

 

[Deleted User 38384]

Cold and Sloppy huh???

Maxxis Trepador Radials
https://www.maxxis.com/nl/en/tire/trepador-radial-m8060/
There are a little bit expensive, but dang are they nice. Those right there are my dream tires. I spend way too much time on the highway to make it worthwhile though.

If you only wanted to hear about the tires you recommended, I haven't heard anything bad ever about Toyo Open Country MT's. Amongst the choices you gave, if I wasn't going to go for the Trepadors, I would go for the Open Country's!!

 

[ENDVR]

I live In Denver and have ran both 37x12.50x17 Nitto Trail Grapplers and Cooper STT Pros on my JKUR year around. I will say all out off-road performance and wear would go to the Nitto Trail Grappler all day long!! But I will say I loved the look of the Cooper STT Pro and it was also better in snow because of the siping Vs. the Trail Grappler.

 

[3TV]

I just got back from the local tire store I have used for years. Availability is a big deal with tires these days, and if you don't want to wait for the ship to get here from China the selection of tires decreases.
Cooper STT Pro tires were available, and that is what I ordered. They should be here tomorrow.
Toyo MTs were not available.
Nitto's were not available.
Falken Wild Peak MTs were available. I've run them before, and they are good tires. I thought about it, but they were down the list a few spots.
BFG KM3's were available but would have cost $450 more for a set of five than any of the other tires. It is debatable if the KM3's are better than the rest. I don't think they are better, but even if they are better, they aren't that much better.

Now I get to test the rumors that 37s fit on a stock 392 XR.

 

[azwjowner]

I just got back from the local tire store I have used for years. Availability is a big deal with tires these days, and if you don't want to wait for the ship to get here from China the selection of tires decreases.
Cooper STT Pro tires were available, and that is what I ordered. They should be here tomorrow.
Toyo MTs were not available.
Nitto's were not available.
Falken Wild Peak MTs were available. I've run them before, and they are good tires. I thought about it, but they were down the list a few spots.
BFG KM3's were available but would have cost $450 more for a set of five than any of the other tires. It is debatable if the KM3's are better than the rest. I don't think they are better, but even if they are better, they aren't that much better.

Now I get to test the rumors that 37s fit on a stock 392 XR.

Falkens are made in Asia. Cooper are made in the US. I think you made the right decision.

 

[3TV]

I had the chance to try out the STT Pros today. Here is typical conditions for this time of year.

I must say I am surprised by these tires on road. They ride nice with no hint of imbalance up to 80 mph. They also track straight and do not have the slight tendency to wander or follow truck ruts that Toyo MTs do, or the stock KO2s, for that matter. Noise is very minimal on the highway, and they are quieter than the Toyo's I normally use.

Offroad conditions included mud and slop at the lower altitudes of 5000 ft. We had light snow at mid altitudes of 6000 ft (picture), and deep snow above 7000 ft. The tires worked good in these conditions, but not quite as good as Toyo MTs, which have been my go-to tire for over a decade. I had planned on taking this road through to the other end, but the snow above 7000 ft was too deep. I was pushing the entire axle, not just the differentials, and the drifts were over the bumper. I was solo, so the better part of valor made me turn around to try another day. Unfortunately, I had come down a steep grade on the way in that made me wonder if I would need to use the winch if I had to get back up it. I almost did need the winch.

The snow at that point was a foot deep, with only my tracks coming down the hill. I tried and failed to make the climb on the first four attempts. I tried everything I could think of but ended up sideways and in the ditch at the edge of the road a few times, and basically tore the hell out of the hill, but didn't make it over the top. I managed to get out of the ditch again, and backed down the hill, to just look at it again, and was thinking I probably needed to resort to the winch. Then I gave my Jeep a little pep talk. I don't name my Jeep, because that is weird, but it does have a gender. So, I quietly said, "Okay Girl, let's do this". The fifth try was the charm. Nothing like low range with both diffs locked, and a 392 bouncing off the rev limiter with a new set of 37s to get the job done.

So, the STT PROs passed their first test. On road I would rate them B+. In mud and slop I would rate them A. In snow I would rate them B-. Hopefully further test won't be so tough.

And, best of all, the 392 passed its test. The driveline is still in one piece.

 

[Tank2112]

I had the chance to try out the STT Pros today. Here is typical conditions for this time of year.

I must say I am surprised by these tires on road. They ride nice with no hint of imbalance up to 80 mph. They also track straight and do not have the slight tendency to wander or follow truck ruts that Toyo MTs do, or the stock KO2s, for that matter. Noise is very minimal on the highway, and they are quieter than the Toyo's I normally use.

Offroad conditions included mud and slop at the lower altitudes of 5000 ft. We had light snow at mid altitudes of 6000 ft (picture), and deep snow above 7000 ft. The tires worked good in these conditions, but not quite as good as Toyo MTs, which have been my go-to tire for over a decade. I had planned on taking this road through to the other end, but the snow above 7000 ft was too deep. I was pushing the entire axle, not just the differentials, and the drifts were over the bumper. I was solo, so the better part of valor made me turn around to try another day. Unfortunately, I had come down a steep grade on the way in that made me wonder if I would need to use the winch if I had to get back up it. I almost did need the winch.

The snow at that point was a foot deep, with only my tracks coming down the hill. I tried and failed to make the climb on the first four attempts. I tried everything I could think of but ended up sideways and in the ditch at the edge of the road a few times, and basically tore the hell out of the hill, but didn't make it over the top. I managed to get out of the ditch again, and backed down the hill, to just look at it again, and was thinking I probably needed to resort to the winch. Then I gave my Jeep a little pep talk. I don't name my Jeep, because that is weird, but it does have a gender. So, I quietly said, "Okay Girl, let's do this". The fifth try was the charm. Nothing like low range with both diffs locked, and a 392 bouncing off the rev limiter with a new set of 37s to get the job done.

So, the STT PROs passed their first test. On road I would rate them B+. In mud and slop I would rate them A. In snow I would rate them B-. Hopefully further test won't be so tough.

And, best of all, the 392 passed its test. The driveline is still in one piece.

I too am looking at Discover STT Pro 37x12.5R17 for my 392XR...

1. How's the on-road after diving for a while?
2. How did they fit, I plan on using stock XR wheels, no wheel spacers for sure.
3. What is the on-road performance difference of the heavier (10lbs.) tire vs. stock tire?
4. Would you buy STT again for 392?

 

[Tank2112]

Cold and Sloppy huh???

Maxxis Trepador Radials
https://www.maxxis.com/nl/en/tire/trepador-radial-m8060/
There are a little bit expensive, but dang are they nice. Those right there are my dream tires. I spend way too much time on the highway to make it worthwhile though.

If you only wanted to hear about the tires you recommended, I haven't heard anything bad ever about Toyo Open Country MT's. Amongst the choices you gave, if I wasn't going to go for the Trepadors, I would go for the Open Country's!!

Maxxis Trepadors are a great rock crawling tire, I have 42" stickies on my custom LJ. Short of the BF Goodrich Krawler sticky tire, very hard to beat for rock crawling. Dry conditions like Moab, I'd vote for Krawler.... muddy conditions like Windrock, I'd give the edge to sticky Treps.
I have tried both.
However the Trepador is a heavy tire that will effect on-road performance of the 392.
Will affect acceleration and braking.

 

[3TV]

I too am looking at Discover STT Pro 37x12.5R17 for my 392XR...

1. How's the on-road after diving for a while?
2. How did they fit, I plan on using stock XR wheels, no wheel spacers for sure.
3. What is the on-road performance difference of the heavier (10lbs.) tire vs. stock tire?
4. Would you buy STT again for 392?

1. I think the STT Pros are just as good on road at 14,000 miles than they were on the first trip. On road they are still surprisingly quiet. My wife has Nitto Trail Grapplers on her Jeep, and they are a lot louder than the STT Pros. And the Nitto's don't track as straight either.

2. They fit my 392 well. My front bump stops are stock. I have extended the rear bump stops 1".

3. Very little change in on road performance. You can notice a slight decrease in performance on the first drive, but after that it just feels normal.

4. Yes, I would buy the Cooper STT Pros before I would by Nitto Trail Grapplers or Toyo Open Country MT's. I am thinking of a taller suspension and 39s next time, so if I go to 39s, I may also consider BFG KM3s.

 

[Smcdowell]

Question for the 37x12.50R17 Trail Grappler owners...what is the actual width of them mounted? On the specs that I've seen, it says actual width is 13.43". I'm currently trying to decide on getting another set of Cooper STT Pro (37x13.50R17) or the Nittos. I prefer the width of my Coopers, so I just want to see how the Nittos compare once mounted. If they really are closer to 13.5", I think I'm leaning towards them. I apprecate any help!

 

[3TV]

I just noticed the width difference on the Nitto Trail Grappler specs today. I'm now thinking of changing to 38" tires, but I would prefer a 38x12.50 instead of the usual 38x13.50 width that all of the 38" MT tires seem to come in. I saw that a Nitto Trail Grappler 37x12.50 is 13.43" wide, but a 38x13.50 is only 13.58" wide. So, only 0.15" wider for the 38" tire (slightly more than 1/8" wider).

 

[failsafe306]

Question for the 37x12.50R17 Trail Grappler owners...what is the actual width of them mounted? On the specs that I've seen, it says actual width is 13.43". I'm currently trying to decide on getting another set of Cooper STT Pro (37x13.50R17) or the Nittos. I prefer the width of my Coopers, so I just want to see how the Nittos compare once mounted. If they really are closer to 13.5", I think I'm leaning towards them. I apprecate any help!

My 37x12.5 TGs are nowhere near 13.5”. A quick measurement with the tape measure shows they are pretty close to 12.5” mounted.

 

[Panda Mafia]

My 37x12.5 TGs are nowhere near 13.5”. A quick measurement with the tape measure shows they are pretty close to 12.5” mounted.

Interesting thread. Think next year I'll be looking into Mt tires. Mickey, Cooper and Nitro ofc my top three. The only reason I was considering Nittos were their size they claimed. Almost 13.5 on 37s. Heavy as hell tho but I thought id bite the bullet due to that size.
Mickeys seams like a smart choice specially for me from my AT to MT.
Both Copper and Baja Boss look sweet too.

Sponsored