Re: Installing larger rims/tires...

[VWGTi@aol.com]

Chuck-

When they did this change they were changing overall tire diameter...which
really messes things up.  When you put 16" rims on your VW with 45 profiles
its keeping the overall diameter close to the same making only a minor change
in speedometer readings.  Nothng that is not bad at all  +/- 3mph.

Jeff

In a message dated 1/25/99 3:49:57 PM Eastern Standard Time,
csimpson@zeltech.com writes:

> I'm not sure if this pertains to our cars, but I was
>  watching "ShadeTree Mechanic" on TNN this weekend
>  and they were installing larger rims and tires on a truck.
>  The first thing they mentioned was how installing larger
>  rims and tires can really screw up the speedo system
>  and the transmission.
>  They mentioned the speedo will need calibrating, so
>  they bought some box that was attached to the chassis
>  and sensor and automatically re-calibrated the speedometer.
>  Then they bought some device that captured signals
>  from the torque-converter and made necessary adjustments
>  as needed.  It kind of looked like a 2-foot cable running
>  through a small box in the middle.
>  
>  Does anyone running 16+ inch rims have problems?
>  Or how do you get your speedometers re-calibrated?
>  
>  I believe they mentioned the truck was an automatic,
>  which may have had a much greater impact on shifting
>  and how the gear ratios were changed by +1.10%.
>  I just wonder what affect the change would have on
>  a manual transmission.
>  
>  j/curious,
>  
>  -Chuck Simpson
>  '98 White Jetta GLX-VR6