TIre expriation dates....

MSS3020

Well-known Member
Have heard about this before thought I'd ask ya'll about Tires having a wear date stamped on them. Buy it or not?? The tires on my 3/4 ton that I pull with are at least 8 years old from installation date. Haven't crawled under to see the date made. Usually stamped on the inside of tire, i guess.
 
They all have some sort of date code for when they were made, not installed. I'm not sure what good that's going to do you. I've had some brands go bad and get rotten in five years. I've also got some no-name "el cheapos" on my plow truck that are 20 years old now and not a sign of rot.

Starting in year 2000, it's done like this. On at least one side of the tire, but NOT always both, the DOT code will show the date with the last four digits.

For example, if it shows "5107", that means the tire was made the 51st week of year 2007.

Before year 2000, only three digit codes were used. So a DOT code ending in 307 would mean the tire was built 30th week of the 7th year of the decade - i.e. it could be 1997, 1987, 1977, etc. No sure way to know.
 
I actually took a course by goodyear and that was mentioned. The way it was explained was if the tires are stored properly all the date means in that from that point forward the performance rating will decline. The tires we were dealing with were for aircraft but he the rep did say it applied to all their products. After the date they should be inspected inside and out for any thing that does not look normal. Apprently you can even have them inspected by goodtear for a price.
 
I bought an older motor home a few years ago. One of the things that I liked about it were the tires had like new thread on them. Well, the first trip one of the tires blew. Scary on a motor home. I just chalked it off to underinflation. The next trip two more tires blew. After some research I found that tires will age & lose their resiliancy. Even sitting on a shelf. Checking the DOT code showed these tires to be 15 yrs old. Nine years is the maximum recommended. I now have 6 new tires on it.
 
It seems to me that when tires are used regularly, they retain their elasticity and "check" less than when left standing for long periods of time. It also seems that inflated tires check and crack less than those that are not inflated. Is that just my imagination?
 
Tires that just sit do deteriorate faster... As tires roll and flex, there are oils and waxes that come to the surface, and help protect against UV and ozone...
 
I don't believe it. That certainly doesn't jive with the tires on my plow truck. Hasn't had license plates on it for 10 years. Spends 99.9% of it's life parked and tires are ancient without one speck of dry rot. Put those cheap tires on 20 years ago and they look like new.

On the other hand, I just had to change all four tires on my 98 Dodge Grand Caravan. Tread was like new but all four were dry rotted on the sidewalls. Tires that went bad were Dean Equus LSi with DOT SD6V DR4 0306 on them. That means they were made the third week of 2006 and were only around 4 years old.

Seems the main factor is the mix of the rubber compound along with how much sunlight hits the tires.

That's why a lot of motorhomes have sun-covers on the tires when they get parked most of the time.
 
flouresent lights will rot em out too...i found a deal on some NOS bias mud grips and went to look at em...they were up in a warehouse with no sun on them...just flouresent lighting...they were all cracked.
 
According to Cooper 6 years is all there good for. At least that's what they told me when mine were 1/2 tread and it looked like when a recap is ready to seperate off. Couldn't read the dates as they were on the insides. I later checked my receipt and they were 6 years old so no adjustment for me !
 
jdemaris is right, but tires from 1990 through the end of 1999 should have a triangle after the date code.
Three digits and no triangle would be before 1990.
 
car and LIGHT truck tires is 6 years recommendation for hd use. super hd simi truck tires are not the same.
 
There are dates and here, noone says anything for 6 years. After 6 years, they have to be inspected and your paperwork stamped yearly. (Common to have a set of summer and 1 of winter here, so you may find someone with 20 year old tires.


Dave
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top