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Archive for November, 2006
Mystery
Posted by Ashley on November 16, 2006
I was driving my car and thought I had run over some glass that was left on the highway from an accident. I pulled into a store and from the inside of the running car I could hear the hiss of air escaping. I went to check the tire and it was rapidly becomeing flat. I put the donut tire on and took the flat tire to a tire repair shop.
They could not find any hole… they filled it with air and checked everything they could. They kept it over night and it held all of the air.
Can this be explained? Is there a reason this could happen? I’m sure this is a dumb question but no one could explain it and I’m afraid to trust the tire.
I will answer this question and "plug" one of our products at the same time (pun intended). We offer a line of tires for on-off highway vehicles call DuraSeal. These tire feature a material that is built into the tire that plugs a hole (up to 1/4" in diameter) by filling the hole with a gummy, yellow material. In your case, it is possible that as the air rushed out of the hole in the tire, it pulled something into the hole that plugged it. This is exactly how DuraSeal works. If you have the tire dismounted, a tire expert might be able to find the hole in the liner of the tire and, if in a repairable area, fix the tire properly.
US Measurement and Metric Tire Size comparison
Posted by E Patrick on November 15, 2006
I would like to get a list of tire sizes in US measurement vs metric in all tire sizes. ie I believe a 285 is the height, what is that size as far as us sizing is concerned? 33 inch, 245 height is 31 inch? also the 75 series tire is 8 inches wide, a 60 series tire is 12 inches wide? There must be a list some where showing the comparison.
Actually, there is not such a list. Like a lot of things in life, it is not that easy. I believe the history goes something like this. The US and our friends in Europe each developed separate tire sizing conventions many years ago. There was a move to standardize the size nomenclature but, tires using the old style (11R22.5, for example) are still around and very popular. The explanation for each element of the metric sizing system is as follows: The first three digits (like 285) is the nominal width of the tire in millimeters. After the / comes a two digit number (like 75) is the aspect ratio (height of the tire section divided by the width of the tire section). The R stands for radial and the final two digit number is, of course, the nominal rim or wheel diameter. There is no simple translation of a metric size to the older, US sizing system.
Use of Retreads on Steering Axle
Posted by Scott on November 8, 2006
I know the Federal Regulations prohibit the use of retreads on bus steering axles; however, the Regs are silent regarding the use on any other heavy vehicle steering axle. Do you know why retreads are prohibited on busses? Further, do you know of any industry standard or best practice that prohibits the use of retreads on steering axles of Class 7 and 8 tractors? Do you recommend retreads for use on steering axles? If not, why?
It would be best if I direct you to a retread website on these issues. Go to www.retread.org/ and type the words steer tires in the search box. A booklet of articles on the subject of the use of retreads on steer axles will appear. There is no explanation of why retreads are not allowed on buses but, there is plenty of other information that may help you with your future decisions.
Flat Spots
Posted by amelia on November 8, 2006
How long would a truck have to sit for the tires to develop flat spots?
Probably everyone has experienced the "thump-thump" of tires that have "flat spotted" from the vehicle sitting for some period of time and the areas of the tires that were in contact with planet earth have taken on the flat shape of the ground below them. I don't think there is any way to predict how long this will take. The type of tire construction plays a part in this along with the temperature of the tire when the vehicle stopped as well as the temperature of the air and the pavement below the tire.
Travel Trailer Tire Life
Posted by Larry on November 6, 2006
The Goodyear Marathon trailer tires that came with my trailer are 5 years old. The tread is good and the tires look fine. What would be a recommended replacement time period for southern Arizona?
I am asked this question often by owners of recreational vehicles. The answer comes from our product service people who have issued this "bulletin" as a response: Goodyear does not state a "uniform" replacement age for tires because there are many conditions that dictate a tire's safe and effective life span. Some factors that influence how long a tire will last are:
Usage per year - more frequent usage will result in longer life
Vehicle storage practices (6 months loaded with little or no rotation is not good!)
Usage in warmer climates can also negatively impact a tire's overall life due to greater extreme ozone exposure
A tire should be replaced when cracks are more than 2/32 " deep or internal components of tire (steel or fabric body plies) are visible. However, the tires in question should be inspected by an authorized Goodyear dealer to determine whether or not they are serviceable.
For more information on tire age and replacement, click on the link below:
http://www.goodyear.com/rv/tirecare/age.html
We appreciate your interest in Goodyear tires and hope you find this information useful.