Re: [T3] Speedo question

[John Jaranson <jaransonT3@comcast.net>]

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> > >
> > Interesting site, but I always thought that the sidewall percentage 
> > was
> > 85% if it wasn't specifically called out (like on our 165/15 stock
> > tires.)  I know we have had this discussion before but don't remember
> > the final conclusion.  I will have to run out and measure the
> > circumference of one of Sophy's stock tires and back calculate what 
> > the
> > percentage is.
> >
> > Anyone know for sure what the sidewall percentage is?
> I just went out and looked at mine. Coopers 165R15 M&S 86T
> I always thought stock tires were 75's.
> Maybe I am wrong.
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.

Later,
John Jaranson
'66 Square (Sophy)
'71 Fasty (Jane - darkside project in waiting)
various parts.....don't we all.
http://mywebpages.comcast.net/jaransonT3/jaransonT3/
http://mywebpages.comcast.net/jaransonT3/2004Invasion/
http://mywebpages.comcast.net/jaransonT3/notavwclub/

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