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Old 05-25-2019, 02:38 PM
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Judging My Tires?

Was at D.Tire getting my tires rotated/balanced. Rep tells me they have 20,000 mi left on them but since they're six years old I need to replace them. Or, he said, might have a sidewall blowout or problems offroading? I'm usually airing down to 18 lbs. (BFG T/A KO LT285-R70/17) The tires were on my '10 Rubicon with only 4000 mi. on them when I bought it April 2016. Suggestions/Feedback?

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Old 05-25-2019, 02:50 PM   #2
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Any tire can have a sidewall puncture regardless of age. Iíve had a sidewall puncture less than 3 months on a new tire.

Mud terrains wear fast and itís about right with his 20k guesstimate in life expectancy with your current tires. Perhaps another 10k and you will need to start looking at new tires.


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Old 05-25-2019, 02:52 PM   #3
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A tire salesman told you that you need new tires... This is my surprised face.
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Old 05-25-2019, 03:19 PM   #4
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From discount tire:

It is impossible to determine a tire’s exact life expectancy, because there is no way to account for the level of influence any one of these factors may have on a tire. However, you can defer to the vehicle and tire manufacturers replacement recommendations:

Vehicle manufacturers recommend tire replacement at 6 years
Tire manufacturers' warranties expire at 6 years
Tire manufacturers recommend replacement at 10 years, regardless of tread depth

From BFG:

While most tires will need replacement before they achieve 10 years, it is recommended that any tires in service 10 years or more from the date of manufacture, including spare tires, be replaced with new tires as a simple precaution even if such tires appear serviceable and even if they have not reached the legal wear limit.
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Old 05-25-2019, 03:31 PM   #5
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Quote:
Originally Posted by srjeepin View Post
Was at D.Tire getting my tires rotated/balanced. Rep tells me they have 20,000 mi left on them but since they're six years old I need to replace them. Or, he said, might have a sidewall blowout or problems offroading? I'm usually airing down to 18 lbs. (BFG T/A KO LT285-R70/17) The tires were on my '10 Rubicon with only 4000 mi. on them when I bought it April 2016. Suggestions/Feedback?
Are the sidewalls showing any cracking/dryrotting?
I say he's full of shit. he just want's to sell you a set of tires
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Old 05-25-2019, 04:15 PM
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good points everyone. yep, i did consider the upsell from the tire guy. just wanna be sure! thanks all!

keep on Jeepin'!
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Old 05-26-2019, 10:49 PM   #7
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Most people only look at the tread depth and maybe for dry rot when evaluating a tire.

Riding sport bikes I've learned that any tire that is more than 4 or 5 years old should be replaced. For the faster bikes, and riders, anything over 3 years old is suspect. Some guys won't use tires 2 years old or older. I'm referring to sport bike tires specifically. Modern sportbike tires have a shelf life of 2 years. Dealers should not sell these tires after that time. You can find good deals online for tires and the reason is they are 3 or 4 years old.

The silica in the tires will harden over time and the tires lose grip as they age. In sudden stop situations or fast corners that tire will lose traction and skid causing a crash. Just looking at the tire it looks fine, but you should always look for the manufacture date on the sidewall which is displayed in a 4 digit number, indicating the week and year of manufacture. Again, this is sportbike specific and not the same for cruisers.

Car, truck, jeep tires are different and do not require the same amount of grip as a sport bike tire, thank goodness. I can only get about 3 to 4 thousand miles out of a rear tire on my Z1000.

However, I imagine the same principle may be at work. The sidewalls may lose their elasticity and become more brittle as the tire ages. Stopping and cornering performance may also be compromised, especially in wet or slippery conditions.
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Old 05-27-2019, 12:20 AM   #8
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And yet, you have classic cars 20+ years old still running their original tires and still holding air. However, they don't get the pressure our Jeep tires do.

Looking at the photo of your spare, if the other tires look like that, I'd keep running them for several more years. If your Jeep is kept inside most of the time, you will get more life out of them than if it stayed outside most of the time. I put new GY tires on my '06 Dodge 2500 a few days after I bought it. Prior to taking a 1400 mile round trip with a trailer in 2013, I noticed some slight crazing and put new tires on.

Just keep a close eye on them.
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Old 05-27-2019, 12:35 PM   #9
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The biggest killer of tires other than mileage is the sun. I had a tire on one of my trucks rip of the rim in a parking lot that was less than 5 years old. That tire was in the sun all day 365 days a year. The other 3 tires where in the shade mostly. So if your tires are in the sun most of the time the 5 year rule is pretty good.
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Old 05-27-2019, 04:58 PM   #10
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If you were in the tire business, I'm not, you would error on the safe recommendation vs risk a lawsuit. It's the world we live in. We can take the recommendation and make our own decisions from that.
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Old 05-27-2019, 05:26 PM   #11
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maybe it's the picture, but those tires look like they are about at the edge of max width for those wheels. is it just the angle?
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Old 05-28-2019, 12:45 PM   #12
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On the motorhome and trailer tires, yes follow the 7-10 year rule.
For everything else, inspect often, and keep a close eye on them.

Lowering tire pressure to 18 pounds is not "airing down".

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