bam02 said:

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Huh? They're actually rated for 65k. Is the rule to change them out 10k early or something? How would I have know that was about to happen?

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Ratings are meaningless, It's just a lab tested rating under ideal conditions. You may get more or less.

Look at the tire tread. The Lincoln head penny test is still valid.

You said in your first post

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Just wanted to share a pleasant surprise. I decided to get all new tires on my 2wd 2014 Tundra when, after about 65,000 happy miles, one of my Nitto Terra Grapplers started to have tread separation.

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Tread separation is a sign of excessive wear. The wear bars and/or penny trick will tell you when it's time to start looking for new tires, which is long before you'll suffer tread separation on old tires.

Also, tire age matters a lot. I think most manu. say after 9-years don't run the tire and replace ASAP regardless of miles/wear on the tire. Some shops will not install a tire if it's older than 7-years per the markings on the tire.

Check for cracking as well. I check my tires when the I change the oil to make sure they're still looking good, regardless of miles. A bad alignment can also cause uneven wear which can cause tread separation.

Ok??? Tires were 3 years old. Had no cracking or other indications of failure.

Had them rotated every 5k. Discount tire rotated them on April 30 and tread was still fine according to them and their guidelines. Separation happened suddenly 6 weeks later. Sorry I'm such a reckless, selfish driver. Maybe you should stay home because I'm out there and I'm dangerous.

1990Hullaballoo said:

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Before they added the Defender name to the LTX, I had a set go 107,000 miles. That was the mileage Discount showed - no speedo issue or wrong tire size to skew calculations . They were 7 years old and were just starting to show small cracks on the sidewall.

Guy at Discount said he had never heard of a tire running that long.

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Several years ago i bought a set of tires at Discount and a couple of weeks later happened to check the paperwork to find that i had already put 25,000 miles on my new tires. It usually takes me 2 years to drive that many miles!

Charismatic Megafauna said:

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1990Hullaballoo said:

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Before they added the Defender name to the LTX, I had a set go 107,000 miles. That was the mileage Discount showed - no speedo issue or wrong tire size to skew calculations . They were 7 years old and were just starting to show small cracks on the sidewall.

Guy at Discount said he had never heard of a tire running that long.

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Several years ago i bought a set of tires at Discount and a couple of weeks later happened to check the paperwork to find that i had already put 25,000 miles on my new tires. It usually takes me 2 years to drive that many miles!

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My FIL got 90,000 miles on one set and had about 75,000 on a second set pre "defender" before his 01 F250 was stolen from Cabelas. He has the LTX AT2s on his 13 now. I think he got almost 70k on those.

75k? 90k? Y'all stop. Agracer is getting his panties all wadded up.

He rarely goes over 2,000 RPM and rotates them religiously.

bam02 said:

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Huh? They're actually rated for 65k. Is the rule to change them out 10k early or something? How would I have know that was about to happen?

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I think "the rule" is to change them based on condition not the mileage rating. Those ratings are just nominal values and your actual wear rate could be very different.

Of course.

TriAg2010 said:

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bam02 said:

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Huh? They're actually rated for 65k. Is the rule to change them out 10k early or something? How would I have know that was about to happen?

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I think "the rule" is to change them based on condition not the mileage rating. Those ratings are just nominal values and your actual wear rate could be very different.

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. Be careful, bam02 might get his panties bunched up and rant about something you didn't say.

On every Tundra and Tacoma I've owned, I've seen anywhere from a 5-10% decline in mpg from switching from the stock tires to all terrain tires.

You pointed out that I ran them til 65k and said change them at 55k so I don't cause an accident.

bam02 said:

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Ok??? Tires were 3 years old. Had no cracking or other indications of failure.

Had them rotated every 5k. Discount tire rotated them on April 30 and tread was still fine according to them and their guidelines. Separation happened suddenly 6 weeks later. Sorry I'm such a reckless, selfish driver. Maybe you should stay home because I'm out there and I'm dangerous.

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Texags, where everyone is perfect and no matter what you do, you did it wrong. Just look at the OB for examples of this in action

I just switched to Defenders from Bridgestones in June on my wife's 2019 Highlander. Less than 30k miles on the Bridgestones, so the change wasn't warranted at this time but that's not point. We then went on vacation in July to the family cabin in New Mexico. Have made this drive a number of times and each time the tires are checked to 36 psi a day or two before leaving, and I fill up in Fort Worth at the same gas station, same grade of gas, at the same time of day before continuing to Amarillo and filling up in the same United gas station. This last trip I average 1-2 mpg better than expected. Hard to account for wind, but I think tires can play a role.

In my case, I think that the rubber compounds in the treads is harder than the previous tires. Or to use rubber terminology, I think it is a higher durometer. They have a longer tread life warranty and higher temperature rating, so I don't think the compound brakes down as much. Not deflecting reduces the localized angle of attack. Basically, the wheel isn't being pushed up such a big slope. To take it to the extreme, this is why steel train wheels are very efficient.

Anyway, the DoE estimates that 4-11% of your fuel economy is in your tires rolling resistance. Consumer reports says in their testing that there is a 34% different in all-season tire rolling resistance. Rough guess your tire's rolling resistance alone is up to 4% of your fuel economy. If you average 27mpg, the tire compound would give up to 1 mpg difference. More than that seems unlikely, but add in tire size, new versus old, and other factors and 2-4 seems like it would be in the ballpark.

bam02 said:

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You pointed out that I ran them til 65k and said change them at 55k so I don't cause an accident.

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It was in jest b/c tread separation is usually a wear issue regardless of miles, and 65k is a lot of miles for a tire on a truck

You then asked why you should not expect tires rated for 65k to last for 65k and others, and myself explained why those numbers are meaningless. It also showed a lack of knowledge on your part regarding tires and maintenance. Tread separation is almost always a wear issue and you need to be aware of that. Then you suddenly added more info (rotation schedule, last check they were fine) that would have been a lot more relevant in your first post regarding the sudden degradation in your tires.

Yes, I was being a smart ass with my first post. But after that I didn't say anything rude or demeaning towards you.

All good.

But I did not ask why I shouldn't expect my tires to go to 65k. I just said they're rated for that so why would I change them at 55k if there are no indications to do so. 3 year old tires with no cracking or other damage.