tire related info

grumpyvette

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http://www.tirerack.com/tires/tiretech/ ... ?techid=11

http://abcnews.go.com/Video/playerIndex?id=4826897

http://tire-size-conversion.com/tire-size-chart/

http://www.miata.net/garage/tirecalc.html

"OBVIOUSLY KNOWING YOUR TIRE HEIGHT HELPS IN CALCULATIONS
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Determining the Age of a Tire

When it comes to determining the age of a tire, it is easy to identify when a tire was manufactured by reading its Tire Identification Number (often referred to as the tire’s serial number). Unlike vehicle identification numbers (VINs) and the serial numbers used on many other consumer goods (which identify one specific item), Tire Identification Numbers are really batch codes that identify the week and year the tire was produced.

The U.S. Department of Transportation (DOT) National Highway Traffic Safety Administration (NHTSA) requires that Tire Identification Numbers be a combination of the letters DOT, followed by ten, eleven or twelve letters and/or numbers that identify the manufacturing location, tire size and manufacturer's code, along with the week and year the tire was manufactured.

Tires Manufactured Since 2000

Since 2000, the week and year the tire was produced has been provided by the last four digits of the Tire Identification Number with the 2 digits being used to identify the week immediately preceding the 2 digits used to identify the year."

BTW its not all that rare for vibrations in older muscle cars to be traced to internal defects in older tires,the older tires might not look defective, externally, but tires over 7 years old are almost always SUSPECT at least due to their potential for internal wear/or delaminating

MORE GOOD INFO

http://www.gtsparkplugs.com/GearCalc.html

http://www.tirerack.com/tires/tiretech/ ... p?techid=7

http://www.tirerack.com/tires/tiretech/ ... ?techid=35

viewtopic.php?f=33&t=917&p=1546#p1546

http://www.tirerack.com/tires/sizes/index.jsp

http://www.tirerack.com/tires/tiretech/ ... ?techid=46

viewtopic.php?f=63&t=1676&p=4071
 
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