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Latest Discussions

  • Profile Picture

    RE: tire degradation

    Posted in: Open Forum

    Nitrogen inflation does eliminate internal aging, but if you go through tires in 6 years, it is not needed. Spare tires need nitrogen but never get it. The Explorer/Firestone issue was the coming together of a defective vehicle and a defective tire, but the tire got most of the blame. Low inflation ...

  • Posted in: Open Forum

    I can help with this as I have been measuring viscosity of engine oils at high shear rates for more than forty years.  There are several empirical formulas that relate viscosity to shear rate or to shear stress.  The most useful for lubricating oils is Carreau or one of the modifications of Carreau.  ...

  • Profile Picture

    RE: tire degradation

    Posted in: Open Forum

    And it is not only the mini spares that obviously exceed the year recommendation that people are proposing, many of the odd size tires that we buy FROM THE MANUFACTURER came out of the mold well over these year ranges. Tire aging appears to be very much a function  of how they are treated. My personal ...

  • Posted in: Open Forum

    The Nitrogen thing is primarily to avoid water in the tire.  Most shop air is very wet and you end up with a steam generator.  Only need to pull vacuum if you are dealing with tires that have been filled with wet air. ------------------------------ Jerry Alcone Retired Albuquerque NM -------------- ...

  • Profile Picture

    RE: Run Flat Tires

    Posted in: Open Forum

    John, I think Bridgestone makes a "passenger" truck tire in that size. For more aggressive tread, I would look at the Michelin "Tweel" line to see if one goes up that large. If you are not having any luck, try old timey inflatable tire liners. Many decades ago, (before arthritis caught up with ...

  • Posted in: Open Forum

    We want your thoughts on Advanced Propulsion! We want to hear from you on this technology, so get ready to chat with an SAE Subject Matter Expert again....as well as your peers! As part of our monthly recurring series, we'll be hosting the next 2-day session in Member Connection on  September 18 ...

  • Posted in: Open Forum

    I would think you would have to pull a vacuum on the tire before adding the N2 to make it effective. I'm way out of my area of expertise on this, but, yes, the N2 pressure in the tire is higher than atmosphere, but the partial pressure of O2 would be low, so, wouldn't O2 migrate into the tire from the ...

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