Of course the width of tires is measured in mm. P225R17 tires are passenger rated with a width of 225 mm and a diameter 0f 17".
Phil > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of Howard Ressel > Sent: Tuesday, January 16, 2007 12:25 PM > To: U.S. Metric Association > Subject: [USMA:37752] Re: Car Talk Puzzler > > Someone else may have heard the answer but, as I was just told from the > person who asked in the first place, the answer was wheels. > > The question I have though is do they refer to wheels in other countries > in inches or just a metric equivalent size. Something tells me its like > pipe. A 12" pipe is still 12" so it fits with older pipe but its called > out as 300 mm pipe (in reality its probably not 12"or 300 mm). For our > foreign list members, do you order tires in inches or millimeters? > > Howard Ressel > Project Design Engineer, Region 4 > (585) 272-3372 > > >>> Bill Hooper <[EMAIL PROTECTED]> 01/12/07 10:55 PM >>> > Here's the complete text of the Car Talk Puzzler that Howard > commented on recently. > > Bill Hooper > Fernandina Beach, Florida, USA > > ===================================================== > Ray said: > > "In the good old USA we still use something called the "British" > system of measurement, i.e., the mile, the gallon, the bushel, the > inch, the rod, while practically the entire rest of the world has > embraced the elegant simplicity of the metric system. > > "As you would expect American car manufacturers used the British > system until globalization infiltrated the marketplace and forced > them to adopt the metric system. Well, nowadays every American > manufacturer uses the metric system almost exclusively. So that > practically every fastener--you know nuts and bolts and whatnot--is > measured in millimeters and even torque specifications are now given > in Newton-meters and not foot-pounds. > > "I travel quite a bit and I spend a lot of time in Bucharest, > Romania, where they most likely have never heard of the British > system of measurement. While being chauffeured around town one day > and sitting in in traffic, I noticed something interesting. I noticed > that every car from the lowly Dacia, where none of the body parts > quite fit, to the high-end Mercedes, is using the British system of > measurement. That's right, there's something on all of these cars, > that is not metric. What is it? > > "I'm going to give you a hint. Your Toyota or your Volvo or any car > that you drive in the United States might have the same part that's > not metric; that is, it's using the British system of measurement."
