Opinions on tire replacement

[XfireZ51]

Quick question.
Thoughts on whether to replace rear tires with good tread depth and Manuf.
date of 4413?
Would u run them another year?

[secondchance]

Quick question.
Thoughts on whether to replace rear tires with good tread depth and Manuf.
date of 4413?
Would u run them another year?

Depends on how you drive.

[Ccmano]

Michelin says 10 years max. As long as they are inspected yearly.
H
:cheers:

https://www.michelinman.com/howLongTireLast.html

[XfireZ51]

Depends on how you drive.

I do spirited driving but typically stay under 90. Don’t do much in the way of racing. Still good tread even in the middle portion of the tire.

Hans,

Thanks. The tires look good.

[Young1]

No sudden moves or heavy power when cold. Take it easy.

[XfireZ51]

No sudden moves or heavy power when cold. Take it easy.

Ask me how I know that already.

[Paul Workman]

Ask me how I know that already.

Yeah, that's true for most "summer" performance tires - Nittos for sure!

Time for new (for me) is triggered when traction when warm reminds me of traction as tho it was only 30º!!:eek::eek: My last set had over 50% of the tread left, but they were 5 years old and were definitely past their prime (for spirited driving...very spirited!).

[XfireZ51]

I’ll be reviewing this issue w Dr. Greekenstein over lunch today.

[DRM500RUBYZR-1]

By 7 years, the tread may have decades of life left, however the tires become noticeably hard and slick.
Cold weather makes an already hard and slick tire downright dangerous.
Being as I sincerely want to live longer, I have been changing mine out at 5 years.
Good Year GS D3 Eagles or Michelins seem to be most favored yet most expensive, although the expense should not be the deciding factor.
Have used Nitto 555's and liked them, not loved, but liked.
The Toyo Proxes Drag Radial looks promising although only for folks who avoid driving in the rain.
The GS D3 is the best tire I have had on the car, although those who have used them and Michelin swear by the Michelins over the Good Years.
My only reason for not selecting the Michelins were that you need one size up to 335, and the good years were actually available at the time I was replacing, which is somewhat rare.
A new cheap tire like Sumitomo is often better than an old expensive tire simply because the rubber hardens as it ages.
Keep us posted with your results and the "feel" of the new ones.
Marty

[EvanZR1]

I won't keep anything over 5-6 years old on my cars. Beyond that, and the grip/traction just drops off way too quickly. By 9-10 years old, even if the tire looks great, it will have probably 25% of the grip of a tire that is less than 5 years old (have experienced this multiple times).

The Shelby wheels I bought had PS2s that were 9-10 years old, and they were night and day difference to the 3-4 year old Goodyears that were on the wheels I took off.

[Top Toy]

I feel your pain Dom! I just threw away a set of brand new looking Michelin PS2's in unobtainium sizes that were on my '95 when I bought it. 15 years old. They actually gripped reasonably well but, like you, I'm not into taking any more chances.

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[XfireZ51]

Dennis,

Pete and I had the car up on his lift and we took a look at the tires. Frankly, there was no sign of dryrot. Rubber appeared “soft” and there is plenty of tread on the tire. U can see the wear bars w plenty of tread.

[lfalzarano]

I replace mine every 5 years, knowing the car will always exceed the posted speed limit by many MPH. It’s better to be on the conservative side and retire your tires earlier, than risk danger to yourself, a passenger or occupants of another vehicle. Lives are at stake.


Carmakers, tiremakers and rubber manufacturers differ in their opinions about the lifespan of a tire. The National Highway Traffic Safety Administration (NHTSA) has no specific guidelines on tire aging and defers to the recommendations of carmakers and tire manufacturers.

“Many automakers, including Ford, Nissan and Mercedes-Benz, tell owners to replace tires six years after their production date, regardless of tread life. Tire manufacturers such as Continental and Michelin say a tire can last up to 10 years provided you get annual tire inspections after the fifth year.

The Rubber Manufacturers Association said there is no way to put a date on when a tire "expires" because such factors as heat, storage, underinflation and conditions of use can dramatically reduce the life of a tire. Here's more on each of these factors:

Heat: NHTSA research has found that tires age more quickly in warmer climates. NHTSA also found that environmental conditions, such as exposure to sunlight and coastal climates, can hasten the aging process. People who live in coastal states and other areas with warm weather should keep this in mind when deciding whether they should retire a tire.”


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[XfireZ51]

Lou,

I’m in Chicagoland, and the car mainly sits in a dark garage unless being driven. When in the cold, I’m not trying to do donuts with it. I’ll see how it goes this spring.
And yes Michelin does say 10 years MAX.

[DRM500RUBYZR-1]

Lou,

I’m in Chicagoland, and the car mainly sits in a dark garage unless being driven. When in the cold, I’m not trying to do donuts with it. I’ll see how it goes this spring.
And yes Michelin does say 10 years MAX.

When you jump on it hard, it will likely go round and round, doing the donuts you did not try. While fun in a parking lot, no fun at all at 7200 going into 2nd or 3rd. I don't trust "remembering" my tires while entranced by the LT-5 song.
(Cautious Marty)

[XfireZ51]

Thx Marty. I know you mean well. I will be “testing” traction (w ASR ON) albeit at lower power levels to see if I have confidence in the grip. 40-50* weather isn’t the time to do that. Costco has the best price for Super Sports that I have found so far.

[spork2367]

Dennis,

Pete and I had the car up on his lift and we took a look at the tires. Frankly, there was no sign of dryrot. Rubber appeared “soft” and there is plenty of tread on the tire. U can see the wear bars w plenty of tread.

They are starting to deteriorate. You can see the cracking in the inside radius.

[XfireZ51]

They are starting to deteriorate. You can see the cracking in the inside radius.

Actually spork, thanks for pointing that out. More importantly, looking closer at that shot, I can see cracks along the side of the groove. Hmmm.

[Gunny]

If you're still "looking" ...
I ran Nitto 555's on my 90Z and was quite satisfied with handling on the mountain roads as well as on the track.
On my '02 ZO6 I ran Nitto NT05 and was even more impressed -- the tire is really a summer tire but I did the Dragon a couple years ago in Feb. - 34 degrees and light snow and the tires did OK.

[XfireZ51]

Thx George. Of course, I have Michs up front also and they are only a bit leas than 5 years old. I ran Nitto Invos for several years and liked them. But the Michs felt much smoother and appeared to have a bit more traction. Wet pavement traction also feels pretty good.

[XfireZ51]

Went ahead and took a closer look at front tires w Manuf Date 2015.

[rush91]

I just noticed my Nittos came from dock 0041.....my car is # 0041. Lucky tires lol???? I was shocked how soft these are compared to my Sumis.