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Tire Wearout Due to Age

Yahoo Message Number: 14130
Hi Folks,

I just had a discussion with the Toyo tire company representative.
Last month a directive went out to dealers and OEMs concerning tire reserve, and therefore, tires should be inflated to the coach placard and not use the TOYO inflation charts. This is because recreational vehicles have varied loads and folks don't always do consistent checks, where as, truckers do weekly pressure checks and inspections and have pretty much the same load weights. (In my case - 120 front and 110 rear placard.) Now for his personal input: If you perform due diligence for pressure and inspection, drive slower, cover tires, drive frequently - you can use the charts if you verify loading but be realistic. I mentioned for side wall protection - no lower than 95 psi.

Again, his personal view is 7 year life if you do the above. Warranty is 5 year limited.

Cracks of 3/16" or less are acceptable. Warm climates = faster ageing.
Because of deaths in recent years attributed to tire fatigue from tire age, the feds may ask for testing and may impliment pull dates as in some European countries. This would be unfair to customers as due to environment or misuse some tires would age faster than others which with proper care could last way beyoud a pull date, if it came to that. What is needed is an age indicator built into the tire. That was discussed. Watch for news from RMA and Nitza.
Fred Kovol

2000 Allure 30593

Re: Tire Wearout Due to Age

Reply #1 –
Yahoo Message Number: 14148
Hi Folks,

Before this subject falls off the page and into history, some response might be in order. I know this subject was burried several times in the past. Added in the discussion with the TOYO company rep: blowouts are not caused by age but by defects or poor maintenance. I had a blow out within the first 1000 miles with the pressures at placard and TOYO replaced the tire and paid for the mounting in addition.
Fred Kovol

[quote author=fredkovol" \.\.\>]
Hi Folks,

I just had a discussion with the Toyo tire company representative.
Last month a directive went out to dealers and OEMs concerning tire > reserve, and therefore, tires should be inflated to the coach [/quote]
placard

Quote
and not use the TOYO inflation charts. This is because recreational > vehicles have varied loads and folks don't always do consistent > checks, where as, truckers do weekly pressure checks and inspections > and have pretty much the same load weights. (In my case - 120 front > and 110 rear placard.) Now for his personal input: If you perform

due

Quote
diligence for pressure and inspection, drive slower, cover tires, > drive frequently - you can use the charts if you verify loading but

be

Quote
realistic. I mentioned for side wall protection - no lower than 95 > psi.

Again, his personal view is 7 year life if you do the above.

Warranty

Quote
is 5 year limited.

Cracks of 3/16" or less are acceptable. Warm climates = faster

ageing.

Quote
Because of deaths in recent years attributed to tire fatigue from

tire

Quote
age, the feds may ask for testing and may impliment pull dates as in > some European countries. This would be unfair to customers as due to > environment or misuse some tires would age faster than others which > with proper care could last way beyoud a pull date, if it came to > that. What is needed is an age indicator built into the tire. That

was

Re: Tire Wearout Due to Age

Reply #2 –
Yahoo Message Number: 14157
Hi Fred,

I have also been waiting to read some comment and feedback on this subject. I am curious as to his definition on "drive frequently".
I would assume he is relating to trucking industry where it is typically daily.

I am just now contemplating replacement of my Toyo M111Z (12Rx22.5) tires. The manufacture date is late 1999 and the coach was completed and delivered in January 2000. So, I am at five years in service with 39,000 miles on them. I keep tires inflated on the high side of what the charts reflect for the weight. I never go below 115 on front and 105 rear. I usually put in the placard 120 front and 110 rear.

I have had the coach weighed during an FMCA rally and was surprised at how close I was balanced on the four points. I guess all those years calculating design effects on CG in aircraft paid off.
Regardless, the frequency of weighing that would have to be done to maintain a good weight and balance is unreasonable. Besides my wife likes to shop. So, I keep the pressures high. The ride in not as good as some, but I really do not want to find out how 40 feet of coach handles with a front tire blowout. It is the pay me now or pay me later approach.

So, I question the seven years service life the Toyo rep tossed out there. Especially when in one part of the discussion he was referring to the trucking industry. I am not sure the trucking industry would ever get seven years use out of any tire on a tractor. The tires are usually worn out by high mileage then the are regrooved or recapped for trailer/utility service tires.

Also, I wonder what he was talking about when he gave acceptable side wall crack limits? I question anyone that pretends to have Xray vision. Visually inspecting the exterior of the side walls does nothing but indicate that if you see any kind of cracking, it is time to consider new tires. The cracks do not always appear on the exterior surface of the sidewall. I truly believe that there can be even more damage under the sidewall surface than what is displayed externally.

Tires are so hard to predict. Age, use, maintenance and environment all play havoc. The manufacturers know they have the best return on investment with their five year limited prorated warranties. So anything beyond that is borrowed time. Six years max and then I feel tires are being driven on thin ice.

This should get some discussion going....

Jim Hughes

2000 Allure #30511

With plans to head for Alaska this Spring....

Quote from: fredkovol
Hi Folks,

Before this subject falls off the page and into history, some

response

Quote
might be in order. I know this subject was burried several times

in

Quote
the past. Added in the discussion with the TOYO company rep:

blowouts

Quote
are not caused by age but by defects or poor maintenance. I had a

blow

Quote
out within the first 1000 miles with the pressures at placard and

TOYO

Quote
replaced the tire and paid for the mounting in addition.
Fred Kovol

Quote from: fredkovol"[/quote
Quote
..>]
>

> Hi Folks,

> I just had a discussion with the Toyo tire company
representative.

Quote
Last month a directive went out to dealers and OEMs concerning

tire

Quote
reserve, and therefore, tires should be inflated to the coach > placard

> and not use the TOYO inflation charts. This is because

recreational

Quote
vehicles have varied loads and folks don't always do consistent > > checks, where as, truckers do weekly pressure checks and

inspections

Quote
and have pretty much the same load weights. (In my case - 120

front

Quote
and 110 rear placard.) Now for his personal input: If you

perform

Quote
due

> diligence for pressure and inspection, drive slower, cover

tires,

Quote
drive frequently - you can use the charts if you verify loading

but

Quote
be

> realistic. I mentioned for side wall protection - no lower than

95

Quote
psi.

> Again, his personal view is 7 year life if you do the above.
Warranty

> is 5 year limited.

> Cracks of 3/16" or less are acceptable. Warm climates = faster > ageing.

> Because of deaths in recent years attributed to tire fatigue

from

Quote
tire

> age, the feds may ask for testing and may impliment pull dates

as in

Quote
some European countries. This would be unfair to customers as

due to

Quote
environment or misuse some tires would age faster than others

which

Quote
with proper care could last way beyoud a pull date, if it came

to

Quote
that. What is needed is an age indicator built into the tire.

That