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On Sun, 2004-04-04 at 21:31, John Jaranson wrote: > Ok, found one site the had a pretty definitive statement about the > whole subject. See below. > > http://mgaguru.com/mgtech/tires/tt101.htm > > "The most common metric radials for these cars are 80 series profile, > sidewall 80% as tall as the tire is wide. Unless otherwise labeled on > the tire, radial tire profile will be 80 series by default (and never > taller then 80%), and the speed rating will be "S" (106 mph 10-minute > run) by default. So when you see 165R15 on a tire it means the same > thing as 165-80SR15. " > > This also jives with my measurement of the one of Sophy's tires that > measured out to right around 25.4" in diameter. > One thing to remember about our cars and speedometer accuracy. Our cars never came from the factory with radial tires in the first place. All of the US production cars came with 6.00-15 BIAS ply tires. The 165 SR/15 was the factory recommended radial replacement. I still have a couple original bias ply tires. My '71 still has the original 6.00-15 Continental spare. -- Russ Wolfe '66 FB MT '71 FB AT '65 Bug (not running) russw@classicvw.org http://www.classicvw.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org