It may read the speed at the tire and vehicle MPH on the newer
systems. Dunno. Requires some looking into.
Mike Schwall
At 12:05 AM 1/27/2000 -0600, you wrote:
>I would think tire sizes would affect the ABS system on some vehicles. A
>bigger tire turns slower at the center than a smaller tire at the same
>road speed. If the ABS computer thinks you have a 27 inch tire, when it
>really is a 30 inch tire, it would think your going slower than you
>actually are. Anyone follow? Now if the ABS system is a blind system, as
>in only detects tire rotation at the wheel itself (like the older ABS
>systems do) then it wouldn't affect it. But if it goes by vehicle MPH,
>then there is a problem. The GenIII Daks don't use speedo gears in the
>tranny, it has an electronic sensor that feeds info to the onboard
>computer, which then gets sent to the speedometer. That is why you have
>to go to the dealer to get your speedo corrected when different size tires
>are put on. Now if the ABS is connected to the computer and gets feed
>speed info that way, then yes it would be affected by tire size changes.
>
>Mike Schwall
>
>
>
>
>
>__________________________
>mschwall@flash.net
>
__________________________
mschwall@flash.net
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