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Old 12-05-2017, 09:05 PM   #76 (permalink)
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Thatís weird, they measure out as 39.76 from cooper.
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Old 12-06-2017, 03:10 AM   #77 (permalink)
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Originally Posted by generalee7 View Post
As for the actual size of the 40's, I had a buddy measure a brand new STT pro at street pressure and it came out to 38.5" so apparently they run a little small?
You buddy's tape measure runs a little short.
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Old 12-07-2017, 07:04 PM   #78 (permalink)
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Probably measured from the ground up with vehicle weight on the tire?
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Old 12-07-2017, 08:19 PM   #79 (permalink)
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Probably measured from the ground up with vehicle weight on the tire?
Yes it had vehicle weight on it. Should have clarified that
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Old 12-07-2017, 08:25 PM   #80 (permalink)
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Yes it had vehicle weight on it. Should have clarified that
Any tire is going to measure less than the printed size that way. The best way is to measure horizontally.
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Old 12-08-2017, 08:30 AM   #81 (permalink)
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I have bought 4ea 35x12.5x15's...4ea, 2 pairs of replacements were out of round but warranted. so out of 6 tires only 2have been good.
They do work great air down off road.
But I'll never buy them again.
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Old 12-09-2017, 08:08 PM   #82 (permalink)
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I have bought 4ea 35x12.5x15's...4ea, 2 pairs of replacements were out of round but warranted. so out of 6 tires only 2have been good.
They do work great air down off road.
But I'll never buy them again.
That's my experience too, they seem to be a very good tire off road, but I can't rotate mine because I only have 2 that are balanced anywhere near good enough to run on the front, so I'm gonna have a square pair with good tread on them when the fronts are done. My spare has 2 6" patches on the inside trying to get it to balance.
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Old 12-09-2017, 09:05 PM   #83 (permalink)
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This is kinda funny to me, I actually swore off Cooper tires a while back after having 3 out of 4 tires separate on a work truck. The tires had maybe 20k on them. Always checked pressures and rotated regularly.

I told that story to quite a few people who said they had bad experiences with cooper's and wouldn't buy them again.

Sorry 45acp

After seeing the price of the 40s and liking the tread pattern, I was thinking about giving them another shot until I read these last posts.

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Old 12-09-2017, 10:29 PM   #84 (permalink)
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I went wheeling with a guy today. Who had ran the old cooper mud terrains and now has the sst proís. He said he canít make climbs that he previously could have. He personally isnít that impressed with them.
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Old 12-10-2017, 04:55 AM   #85 (permalink)
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Sorry 45acp
I dont work there, but if i did, i would complain about alot of stuff that may or may not be relevant to this thread.

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Old 12-10-2017, 01:58 PM   #86 (permalink)
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I went wheeling with a guy today. Who had ran the old cooper mud terrains and now has the sst proís. He said he canít make climbs that he previously could have. He personally isnít that impressed with them.
That sucks. However, it's great to know, I was kinda eying these up.
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Old 12-10-2017, 05:47 PM   #87 (permalink)
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That sucks. However, it's great to know, I was kinda eying these up.
Iirc the old ones had a lot of siping, which usually helps with traction. On the flip side it makes the tires chunk out faster. The one guy I know who ran the old cooper's said he wasn't happy with the amount of chunking after one fordyce trip. That was my experience with my mtr-k's as well.
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Old 12-10-2017, 09:30 PM   #88 (permalink)
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Iirc the old ones had a lot of siping, which usually helps with traction. On the flip side it makes the tires chunk out faster. The one guy I know who ran the old cooper's said he wasn't happy with the amount of chunking after one fordyce trip. That was my experience with my mtr-k's as well.
The guy that talked with had just had the new ones siped. But hadnít hit anything hard yet.

My mtr-kís chunk out a lot more than my old og mtrs. Iím not all that impressed with them. Although theyíre quiet and run pretty smooth.

Iím eye balling the falkens or Nitto trail grapplers. But thatís another thread.
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Old 12-10-2017, 09:42 PM   #89 (permalink)
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The guy that talked with had just had the new ones siped. But hadnít hit anything hard yet.

My mtr-kís chunk out a lot more than my old og mtrs. Iím not all that impressed with them. Although theyíre quiet and run pretty smooth.

Iím eye balling the falkens or Nitto trail grapplers. But thatís another thread.

Iíd go nitto over the falkens. My buddy has a set of falkens and absolutely hates em. Iíve watched him climb obstacles running 6lbs of air nothing hanging em up. Just 4 tires spinning doing completely nothing, then his dad in the same rig (TJ) on the same size tires but with Iroks walk the obstacle.

I didnít hear it first hand but from what heís heard talking to people running them is that they hook up ok when new and once they wear a tad they get horrendously worse.
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Old 12-18-2017, 05:22 AM   #90 (permalink)
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Iíd go nitto over the falkens. My buddy has a set of falkens and absolutely hates em. Iíve watched him climb obstacles running 6lbs of air nothing hanging em up. Just 4 tires spinning doing completely nothing, then his dad in the same rig (TJ) on the same size tires but with Iroks walk the obstacle.

I didnít hear it first hand but from what heís heard talking to people running them is that they hook up ok when new and once they wear a tad they get horrendously worse.
having run with the ORD guys on UA2017, how do your coopers compare to nittos.....Ebay has really good pricing on coopers at the moment and really toying with biting.

mind you this is a trail only truggy.
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Old 12-19-2017, 10:58 AM   #91 (permalink)
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having run with the ORD guys on UA2017, how do your coopers compare to nittos.....Ebay has really good pricing on coopers at the moment and really toying with biting.

mind you this is a trail only truggy.
That's a tough one because most of the wheeling we did wasn't tough enough on tires. Sand Hollow is very favorable to tires because its like sand paper, damn near bald tires would work well. Both ORD and I were one of a couple rigs to make the big ledge on the UA video.

The rest of dirt roads there wasn't a competitive advantage over either.

If we spent a lot of time of slick and wet rocks or boulders that moved under you I would say I could have a good comparison.

Its also tough to tell with rigs that are very different. Hes got way more travel, way more horsepower and more gearing. With that said I did not see either of us going damn, I would have made that if my tires gripped.
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