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Archive for July, 2006
Tire Rotation Arguement
Posted by Tim on July 8, 2006
I work in a retail tire store and have an ongoing arguement with my store manager and my general service guys about the purpose of tire rotation. It is common practice in my shop to not rotate if the rear tires are at a lower tread depth than the front tires, say 8/32 front and 6/32 rear. They believe that they are extending the life of the 6/32 tires by keeping them off the steer/drive axle, which is hard to argue with because it is true. However, aren’t we now just sacrificing the 8/32 tires to accomplish this? Isn’t one of the main reasons for rotation to spread the shoulder wear induced by turning and front engine weight bias? Won’t this practice create adverse wear that voids any treadlife warranty the customer may have?
Tire rotation is intended to even out the wear between (or among) wheel positions and, by reversing the direction of rotation, attempting to even out any irregular wear that may have started. I can't speak for all the tire manufacturers but, in our case, rotating the tires will not void the warranty and, if done properly, should help adverse wear not create it.
Plymouth Rims and Tires
Posted by Tim on July 7, 2006
I’m looking for 1968 Plymouth Barracuda tires with the red stripes. Do you know where i can find remakes?
I have the following contacts that may be able to help you with some classic car tires.
Kelsey Tire in Mo 1(800) 325-0091
Lucas Automotive in OH 1(800) 735-0166
Universal Tire in PA 1(800) 233-3827
Wade Tire in TX 1(800) 666-8973
Tire Losing Air
Posted by Tim on July 6, 2006
I have low profile tires on my Mercedes sedan. I had a tire that was losing air, so I bought a new one. Now that one is losing air. Is this the nature of low profile tires and rims or do I possibly have a burr or something?
When you had the new tire put on, did they use the same valve stem? Maybe it isn't the tire at all. Take the Mercedes to a tire store with a large tank of water to submerse the tire/wheel. The technician should be able to check for bubbles and determine where the air is coming out.
Date of Manufacture for a Tire
Posted by Tim on July 5, 2006
How do we find the manufacture date of an older tire?
Here is the explaination (directly from the Department of Transportation website) of the DOT code which is found on every tire.
"U.S. DOT Tire Identification Number
This begins with the letters "DOT" and indicates that the tire meets all federal standards. The next two numbers or letters are the plant code where it was manufactured, and the last four numbers represent the week and year the tire was built. For example, the numbers 3197 means the 31st week of 1997. The other numbers are marketing codes used at the manufacturer's discretion. This information is used to contact consumers if a tire defect requires a recall."
Tire Size Comparison
Posted by Tim on July 3, 2006
Is the 225/70R19.5 the same size as 8R 19.5?
No. These are two completly different tire sizes. The only common factor is the 19.5" rim diameter.