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| [GMCnet] Tire age advise [message #346983] |
Wed, 28 August 2019 17:40  |
fbhtxak
Messages: 191
Registered: April 2006
Karma:
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Senior Member |
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Mark,
I note that the Michelin XPS RIB is an "all steel" tire.
I agree with your observations on change interval for that "all steel" tire.
Until about seven years ago, I had Goodyear G159 tires ("all steel") on my
GMC. I changed them at 12 years and about 80K miles (and still not worn to
the "wear bars"). There were no signs of any deterioration. The coach was
always in an insulated, sealed garage when not in use (about 9 months total
each year).
I did not replace them with the successor G159 as the cost was going to be
about $360/tire "off the shelf". I instead bought BF Goodrich Commercial TAs
("fabric" sidewall) with the intention of using them like the G159s. Not to
be - at about 5 years and about 40K miles, two of them began to show
evidence of failing sidewalls ('fortunately discovered before actual
failure). In comparing notes with a couple of major GMC service vendors and
other owners on use of those and other "name brand" fabric-wall tires, the
"counsel" was to plan to change them, REGARDLES OF MANUFACTURER, at about
five years. So - I, am doing that. The fabric-sidewall tire does "ride" more
comfortably than the G159s but 'have to incur the hassle of changing them
out twice as often as "all steel" tires.
Re " Only thing I do is a walk around of the coach with a visual inspection
and a non-contact thermometer at every gas stop while on the road. Other
than those checks, I didn't worry at all about the tires." My practice is
the same. It has served me well.
Fred
Fred Hudspeth
1978 Royale (TZE 368V101335) - Tyler, TX
1982 Airstream Excella (motorhome) - Cooper Landing, Alaska
Message: 1
Date: Wed, 28 Aug 2019 10:02:15 -0600
From: Mark Sawyer
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Tire age advise
Message-ID:
Content-Type: text/plain; charset="utf-8"
This topic is similar to motor oil threads... Everyone has an opinion, and
everyone's opinion is gospel. It's almost like getting into a politics or
religion discussion... I'm going to add my opinion here, but bottom line is
do some research, and use some common sense and make your own decision.
Scenario 1: Your tire is 7 years old. It is a quality tire, but you don't
know the history. REPLACE Scenario 2: Your tire is less than 7 years old.
It either looks like hell (weather/age cracked, worn funny) OR is is a low
quality tire. REPLACE Scenario 3: Your tire is greater than 7 years old.
It looks fine. There is no adverse wear or weather checking. You know the
tires history. It has not been run underinflated or abused in any way. It
is a quality tire. You are probably ok.
And I'll do one better and put my money where my mouth is. I run Michelin
XPS Ribs on my coach. The coach and the tires have always been stored
indoors. Tires have not been abused in any way. There is no age checking
at all. Wear pattern is fine. They are greater than 10 years old. As a
matter of fact, in the last 4 years, I have not even had to add air to the
tires. At all. (I don't travel in winter... Only drives to keep the coach
limber, so the reduced pressure due to the cold is not an issue, as the
coach is also lightly loaded)
I just did a trip from Texas to Florida and back with my family of 5 with
the coach fully loaded. It was 104 out when I left, and similar temps most
of the drive. Only thing I do is a walk around of the coach with a visual
inspection and a non-contact thermometer at every gas stop while on the
road. Other than those checks, I didn't worry at all about the tires.
Here is an interesting read from a Fire Safety organization on tire age and
Fire Apparatus that was publised a few years ago. Reading through the
study, their findings make sense to me... And in my opinion, if what is
described below is good enough for an emergency vehicle, it's good enough
for my coach...
https://www.nfpa.org/-/media/Files/News-and-Research/Fire-statistics-and-rep
orts/Emergency-responders/RFAutomativeFireApparatusTireReplacement.ashx?la=e
n
Quote:
> From the present research, it is found that no literature convincingly
> supports a seven year tire replacement criteria. Further, it is
> realized that the wear and tear of the tire are due more importance
> while considering a tire replacement. As mentioned in the rubber
> manufacturer's association statement, since service and storage
> conditions vary widely, accurately predicting the actual serviceable
> life of any specific tire based on simple calendar age is not
> possible. A tire should be removed from service for multiple reasons:
tread wear to minimum tread depth, tire damage like cuts, cracks, bulges
etc., improper inflation pressure and storage conditions. A specific
inspection and maintenance of fire apparatus tire is recommended.
--
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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