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November 2009
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Tim Miller
Marketing Communication Manager
Goodyear
(330) 796-7922
Tim Miller has been with Goodyear for over 30 years. He spent 8 years as a tire design engineer before taking positions as a technical representative to original equipment customers Freightliner...more»»
Featured Question
Recycle symbol.
Posted by Mark from Greensboro, NC, US on September 30, 2009
Why don’t tires have a recycle designation (the triangle with the number inside) on them? Tires get recycled into many other products - so they are recyclable. Isn’t this required by the government?
For more than 30 years, the familiar triangular shaped "recycling" symbols have been found on many plastic, glass, metal and paper products. These recycle symbols are printed on these different products to promote recycling. The government does not require these recycle symbols to be displayed. Different industries have developed their own versions of the recycle symbol that are used to encourage consumers to collect these products for recycling. For example, the plastics industry uses the triangle symbol with different numbers inside to indicate a specific type of plastic, necessary for their specific recycling processes. The recycle symbols found on plastic bottles, cardboard, etc., alert consumers to collect these products and help direct them to collection centers.
According to the Rubber Manufacturers Association in 2007, 89.3% of the scrap tires generated in the U.S. by weight were consumed in end-use markets. Scrap tires have many different end uses. These uses include tire derived fuel for cement kilns and paper mills, various products made from ground rubber tires, and shredded tires used as light-weight backfill in civil engineering applications. These and other applications either recover the energy from oils in the tire or end up in a new, different product.
The tire industry is sensitive to the need to assist in promoting environmentally and economically sound end-of-life management, re-utilization and disposal practices for its products. To promote the development of appropriate markets for scrap tires, The Rubber Manufacturers Association provides technical and policy information regarding scrap tire management and markets, hosts national and regional scrap tire conferences for potential re-use industries, and advocates for sound programs to address scrap tire issues. You can find additional information on "end use markets" and scrap tire management at the website shown below.
http://www.rma.org/scrap_tires/
On a global basis we are working with The World Business Council for Sustainable Development (WBCSD) and numerous state and regional organizations to promote end of life tire management programs. Their website is:
http://www.wbcsd.org
Rolling resistance
Posted by Bren from Kansas City, MO, US on November 3, 2009
I work for a Freightliner dealer and I am submitting a quotation on a few tractors with G395 fuel max steers and G372A drives (295/75R22.5 14ply). The customer is requiring that I state the rolling resistance of those tires. Can you help me locate that info? I can’t find it anywhere. Thanks!
It is difficult to explain but, we do not publish rolling resistance numbers. Rolling resistance is measured on a machine that compares the values obtained to a control tire. On any particular day, with any particular machine at a certain air temperature, inflations pressure and load, you will get a rolling resistance value.
Another company doing the same test on a different machine with different conditions will most likely get a different value. Imagine you and I getting on our respective bathroom scales and comparing our relative body weights. Different scales, different conditions and, probably, not a true comparison of our weights.
Rotation
Posted by Rand from Springfield, OH, US on October 26, 2009
We put your tires on Fire Trucks. We have been quizzed about rotation. Any recommendations reguarding swapping fronts side to side or duals between each other or sided to side? Thanks
Sample tires:
FRONT 315/80 r 22.5 G291
REAR 12R22.5 LRH G124
Thanks
It is a good idea to rotate tires around the truck to even out wear. Obviously, in your case, the steer axle tires can be switched left to right. For the drive axle tires, switching side to side AND from axle to axle is fine as long as the tires are within 1/4 inch in diameter.
Tire pressure 1
Posted by Bill from Atlanta, GA, US on October 26, 2009
EPA says that 1 PSI loss is equal to .3% reduction in MPG. Good year charts show that 1 PSI loss for commercial truck tires is equal to .1% loss in MPG. Assuming the EPA rating is for Passenger cars, What is the difference between this and commercial truck tires? As an example for the following Goodyear tires;
G947 RSS - LT235/85R16
G647 RSS - 225/70R19.5
G149 RSA - 9R22.5
If your question is why the difference I would say it is a matter of the recommended inflation pressure for passenger tires vs the commercial tires you give as examples. A typical passenger tires would have an inflation pressure around 30 psi. The tires you mention are 80 psi up to 110 psi. As a percent of the recommended pressure, 1 psi for a passenger tire is about the same as 3 psi for a commercial truck tire.
goodyear 338
Posted by Richard from Shelbyville, TN, US on October 23, 2009
My goodyear man say the company does not recomend using the 338 on a dual axle tractor but does not know why. I would like to know why.
The G338 1AD is intended for a single drive axle tractor. It is an agressive tread pattern and would wear faster than a tire designed for a tandem drive axle tractor, like our G372A LHD.