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Link and notes about tires [message #302264]

Sat, 18 June 2016 12:38

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

As I recently mentioned, I got to listen to Roger Marbles for and hour and then have another half hour of impromptu discussion outside the door. As said, I have not yet digested everything I learned, but we are getting closer.

I am writing today to forward this link:
http://www.rvtiresafety.com/2014/08/how-do-i-inspect-my-tires.html

A portion of what I wanted to pass along is there. But there were two things that hit me with the importance.

First is: If you have run a tire low on design pressure for the load, that tire has been damaged.
Reinflating it will not correct the damage. Ego, checking tire pressures is more important than most of us realize.

The second is that heat is worst the enemy of tires. There usually seven layers (often more) of different rubber compounds in a tire. Heat can cause them to loose the bond that they are supposed to have with each other. He did specifically point out that a class B near the door had white tire covers and mentioned that it was the right thing to do. Someone asked about ozone damage. Roger replied that this was a non-issue as tire companies all use ozone damage resistant compounds in the outer layers to prevent this damage.

I asked him specifically about the seven year life issue, to this he replied with a very firm Maybe. He went on to say that (again) the big issue was heat and if he knew the thermal history of a tire he could predict its useful life very accurately. He would not answer if there was a definitive age.

If you want to learn a whole lot more without me getting around to writing it (and even that is a crap shoot), go to Rogers's website/tire blog.
http://www.rvtiresafety.com/ and you will find answers to questions you haven't even thought of yet.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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Re: Link and notes about tires [message #302295 is a reply to message #302264]

Sat, 18 June 2016 23:30

Handyman

Messages: 229
Registered: April 2016
Location: The Netherlands

Karma: 2

Senior Member

A short story about our "Tire expirience" last day in our rental MH ...

We were driving in the direction of Idaho Falls on the I-15S at a speed of 60 mph, not to fast since there was a crosswind, and those standard like shoeboxes build MH have a roadstability that is far from normal ....

At once there begon a rithmic flapping/metalic sound that was not normal so I pulled out as soon as possible. But still some miles to the next reststop.
A better inspection of the right back wheels and all around them, showed me that the front mudflap, got partial lose, was due to the speed and wind rubbing against both back tires on the right, it is a Ford E350 chassis, both tires had rubbed there shape into that mudflap, so there were only two small stripes left of it ..... The outer could not do much more harm then rubbing lightly the outerside of the visible tire, but the inner stripe was banging against the innertire valve ?? How it calls i don't know in english, but I call it extentiontube ??

That gave that banging metalic sound. Now comes the interessting part. It flapped so intens against that tube extention that it somehow had vibrated out the dustcap including the valve !!!
As I tried to check the airpressure of both tires, since the outer seemed some more flat, I only measured 75 psi on the outer, 0 psi at the inner, but ... Hé there's nothing to measure, no valve and totally no pressure anymore.

I never had seen something like that. Checked instantly the temperaure of both tires and they were warmer then normal, but I could lay my hand on it without the feeling to burn it. So that was not to bad, I didn't drive more then 10 miles with this very dangerous combination.

Rest of the story, I installed a new valve, brought the pressure up to 80 psi, and most importantly, using a kitchennife, since rentals almost have no tools abord, cut both parts of the mudflap of.
At a Walmart tire&lube center I ask a friendly technician to double check and inspect it for me.
And he also was surprised that something like this was possible.
At first glance he could not see any visible damage, and also the innertire had hold its 80 psi perfectly ...

But would this be my MH, I would change them, especially since they are driven already about 60.000 miles., that combined with the very heavy circumstances those rentals are driven at.

Bye, Daniel .... Currently at Idaho Falls - Snakriver Campground

Daniel Jacobs, NL-USA 1977 GMC Eleganza II, Rebuild 455 (2019) 3.55 FD. FiTech and (Modified) FCC, Electric Pump, insulated GasTanks, 100A Alternator, APC, McDash, Schräder Valves + extern Fills, Ceramic Film, TPMS, FlexSteel Seats

[Updated on: Sun, 19 June 2016 08:27]

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Re: Link and notes about tires [message #302299 is a reply to message #302264]

Sun, 19 June 2016 07:28

jhbridges

Messages: 8412
Registered: May 2011
Location: Braselton ga

Karma: -74

Senior Member

If it was mine, I'd have the run flat tire taken off the rim and checked - and I bet it will show damage to the sidewall. The rental company probably won't even if you tell them what happened. And the next guy will have a failure.

--johnny

Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell

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Re: Link and notes about tires [message #302598 is a reply to message #302299]

Fri, 24 June 2016 19:51

Handyman

Messages: 229
Registered: April 2016
Location: The Netherlands

Karma: 2

Senior Member

Hello Johnny,

A late responce ... But in the parks there was not always that good wifi .... So.
If this were mine I would not thrust them for sure.

We are now back in Canada, and I checked the tire(s) everyday.
At the Walmart in Idaho Falls they filled them up to approx. 80 psi.

The inner right backtire was two days ago 74, today, just measured, at 72,5 psi ...
Not bad I think, but I will be monitoring them till we return the rental, next thursdaymorning in Calgary.

Bye, Daniel

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Re: Link and notes about tires [message #302841 is a reply to message #302598]

Wed, 29 June 2016 15:45

Handyman

Messages: 229
Registered: April 2016
Location: The Netherlands

Karma: 2

Senior Member

Our last days in Canada and the North Americas ... Crying or Very Sad

It has gone to fast, but we enjoyed every moment of it!
Flying home tomorrow.

PS: Did a last fillup of the tire in Pincher Creek, gave both tires 84 psi, they hold that pressure up to now ...

Daniel

[Updated on: Wed, 29 June 2016 15:47]

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Re: Link and notes about tires [message #302842 is a reply to message #302264]

Wed, 29 June 2016 15:54

lqqkatjon

Messages: 2324
Registered: October 2010
Location: St. Cloud, MN

Karma: 5

Senior Member

tire valve stems sometimes have a max rating of 65 psi. alot of tire people who do not pay attention, will install those valve stems, and they will blow off. I would guess a walmart tire center might not even have valve stems rated for above 65psi.

so with higher rated/pressure tires, you need to be vigilant and make sure they install a valve stem that is rated for the higher pressure.

Jon Roche 75 palm beach EBL EFI, manny headers, Micro Level, rebuilt most of coach now. St. Cloud, MN http://lqqkatjon.blogspot.com/

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Re: Link and notes about tires [message #302846 is a reply to message #302842]

Wed, 29 June 2016 16:41

Handyman

Messages: 229
Registered: April 2016
Location: The Netherlands

Karma: 2

Senior Member

lqqkatjon wrote on Wed, 29 June 2016 22:54

tire valve stems sometimes have a max rating of 65 psi. alot of tire people who do not pay attention, will install those valve stems, and they will blow off. I would guess a walmart tire center might not even have valve stems rated for above 65psi.
so with higher rated/pressure tires, you need to be vigilant and make sure they install a valve stem that is rated for the higher pressure.

Thanks for the warning, I was not aware of that.
But since the tire valve stems are from a walmart where they also sell light trucktires, I hope they installed the right ones.
Till now they hold up just fine, the even slightly raised pressure of 84 psi (label advises 80 psi for all tires of this Ford E-350 chassis)

Daniel

....... Flying back to Europe tomorrow afternoon .......

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