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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»»
Fuel Economy 102
Posted by Veral from Springdale, AR, US on August 3, 2009
California has passed a law that will go into affect in the future that will make it illegal to operate equipment in a tradition over the road capasity that has retreads capped on other than Smartway approved (fuel efficient) casings. They are not regulating the retread, only the casing. My question is since 60% of the fuel economy comes from the tread, do I gain anything by putting a non-fuel efficient retread on a fuel efficient casing?
Well, 40% of the rolling resistance does come from the casing. I can't speak for all tire manufacturers but, I can tell you that the casings for some fuel efficent tires are different (than standard casings). So, there could be some fuel efficiency advantage to the SmartWay approved tire casings. There is work being done by the SmartWay people to approve certain retreads but, this is a work in progress.
Truck Tires 101
Posted by Rick from Yates Center, KS, US on August 1, 2009
What’s the difference between 11R 22.5 and 275 80 22.5 tires?
The 11R22.5 is consider a "standard aspect ratio" tire. To the average person this means nothing but to a tire designer, it means that the section height and the section width are nearly the same (now you are really confused). The 275/80R22.5 is a low profile tire. This means that the section height is smaller than section width (in this case 80% as tall as it is wide). The diameter of the two sizes you mention are about the same but the 275/80R22.5 is probably more than an inch wider. The load range H version of the 275/80R22.5 carries a greater load than the load range H version of the 11R22.5.
Fuel Economy 101
Posted by Veral from Springdale, AR, US on August 1, 2009
I know that casing design, tread depth, tread compound and tread design can all contribute to the make up of a fuel efficient tire. My question is when choosing a fuel efficient retread what percentage of the fuel efficiency comes from the casing construction and how much from the tread portion of the retread?
About 60% of the rolling resistance of a tire comes from the tread. Our brochure "Factors Affecting Fue Economy" can be downloaded from our website page here http://www.goodyear.com/truck/support/fuel_econ_index.html
Choosing the proper tire?
Posted by Peter from Auburn, WA, US on July 31, 2009
I pull a 3 axle household goods trailer nationwide. We get into some tight places apartments, small streets ect. I can lift the rear axle to lessen the scrubbing and tearing. The axles are 14000 lb axles and we generally are 36000 to 40000 lbs on single tires. Tire size is 295/75R22.5. The ones on there are really not rated for the load and they are 14ply “G” rated tires. I have not had the trailer long nor have I had problems. When tires need to be replaced I wondered which would be best. Any information you could provide would be appriciated. Thank you….Peter
At 40,000 lbs on 6 tires, you need the carrying capasity of 6666 lbs per tire. The tire you are using is probably a load range G tire and has a capasity of 6,175 as a single tire. But, we make a 275/70R22.5 load range H tire (G104 RST) that is made for the type of service you describe. This tire can carry 6,940 lbs per tire as a single tire.
Is there a fleet inspection form i can download?
Posted by Rich from Muncie, IN, US on July 30, 2009
Is there a fleet inspection report vailable for download and printing?
With tread depths, air pressures and wear signs?
We do not have such a form for downloading from our website but, it a good idea. I will propose this to our sales/marketing people. In the mean time, you might consider some forms that are in TMC Recommended Practice RP 230A, "Tire Test Procedures for Tread Wear, Serviceablity and Fuel Economy".