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Search TiresQ/A ArchivesAugust 2008
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Tim Miller 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»»
Approved Rims for a 385/65R22.5 Tire I have a 1988 Autocar dump truck I purchased in Maryland. The truck originally has 11 x24.5 tires on old style aluminum budd wheels. The truck is now in Florida and I’d like to put 385/65R22.5 flotation tires on the steering axle. I have no idea which wide base rims will work on this truck. The approved rim widths for the 385/65R22.5 tire are 11.75 inches and 12.25 inches.
Tire Fuel Economy with Larger Tires I have a 2001 Ford F350 Dually 4x4 Auto Powerstroke. I am currently getting 13mpg with most driving on the highway 75mph. I was speaking with my buddy who recommended I go from 235/85R16 tires to 265/85R16 or 285/85R16, basically a taller tire. I am curious if this would improve my fuel milage and if if would be signifigant. I think I have the 4.11 rear end. I was told my power off the line will be effected but my top end on the interstate will be better. I am curious if this sounds right and if I could expect other problems with this type of change. With all other things being equal, a taller tire is better for fuel economy and a wider tire is worse. Going from the 235/85R16 to either of the other two tires gets you a taller, wider tire so, my guess is that the fuel economy difference will be too small to measure. Other issues... the change in diameter will affect your gearing, speedometer and odometer all of which affect how the fuel usage is calculated.
Retreading I continuelly hear about how great it is to retread your old tires. The problem I’m having is finding someone to buy my old casings to retread them. Do you have any suggestions? Retreading tires for use on drive axles and trailer axles is very common in the trucking industry. Finding a commercial tire dealer that provides this service should not be too difficult. Try the dealer locator on our commercial tire website www.goodyear.com/truck. If you have retreadable casings, the retreader can either retread the tire casings you provide to him or he can make you an offer to buy your casings from you.
8r19.5 G647 RSA & RSS question I have a 27 foot class A Motor Home that has a 8r19.5 G647 RSA tire on the left front and a Cooper tire on the right front. The G647 tire has hardly any wear and I don’t like the idea of mixed tires and especially on the front. I’ve tried to find a G647 RSA, but they’re no longer available. Can I put on the RSS tire, as a replacement for the Cooper tire, and expect the same ride as I would have with the RSA tire, or is it recommended that I change both? Yes. Goodyear no longer makes the G647 RSA tire and the G647 RSS is very similar. This tires ride properties should be very similar to the RSA tire.
Age of Tires Hi Tim, 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: |
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