RE: Installing larger rims/tires...

["Squier, Craig" <craig_squier@arvin.com>]

Also,
most tire manufacturer's list the tires actual diameter and circumference in
their product literature. Heck, that info may even be on their website.
So try to compare the actual values if you can. I would worry about it
though. As long as you keep the diameters within a quarter inch, you should
see less than 2% error...

_Cab

> ----------
> From: 	Ng, Kevin (NationsCredit)[SMTP:kevin.ng@nationscredit.com]
> Reply To: 	jettaglx@igtc.com
> Sent: 	Tuesday, January 26, 1999 10:45 AM
> To: 	'jettaglx@igtc.com'
> Subject: 	RE: Installing larger rims/tires...
> 
> 	One *minor* note, just to avoid confusion: If you have 15" rims with
> a 3" sidewall, I'm assuming the total diameter of the wheel to be 21"
> (15+3+3). So, going to a 16" rim you would need a 2.5" sidewall.
> 
> 	BTW, there is a great article about all this in the current Car &
> Driver magazine (Mar 99? The one with the XJR vs. E55). One interesting
> thing the article discussed was that the sidewall/tire width ratio is not
> always exact. For example in a 205/50-15 the sidewall may not be exactly
> 50%
> of 205mm. It could be 53% or 47%. So the only sure way to tell if you're
> going to get accurate speedometer readings is to go out with a tape
> measure
> and measure the difference in the circumferences of the two wheels.
> 
> 	Kevin
> 
> > -----Original Message-----
> > From:	Khan Klatt [SMTP:kmk@pacificrim.net]
> > Sent:	Monday, January 25, 1999 5:11 PM
> > To:	jettaglx@igtc.com
> > Subject:	Re: Installing larger rims/tires...
> > 
> > Assume that your sidewall on your 15" rims is 3".
> > If you go to a 16" rim, you don't need a re-cal if your tires sidewall
> is
> > 2".
> > Again, if you go to 17" rims, you don't need a re-cal if your tires are
> 1"
> > sw.
> > 
> > -Khan
> >
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