<VV> spare tire question

[James Davis]

Any difference is rear tire diameter will soon kill a Corvair 
Positraction.  Actually it overheats and wears out the clutches in 
the differential.  You can lose the clutch preload in as little as 
one mile.  If you loose a rear tire, just mount the spare on the 
front and move the front tire to the rear.  The standard rear jack 
point for the Corvair lifts the front and rear tires at the same 
time.  With mismatched tires on the front, the handling will be a 
little unnerving but if you are careful you cam make it to a repair facility.
Jim Davis


At 07:16 AM 12/18/2006, John McMahon wrote:
>Hi,
>
>I've got a 1965 Monza that's almost ready to come down off the jack 
>stands. I'm putting 15" wheels on it and tires with a diameter of 
>about 25".  I would like to use one of my 13" wheels for a spare, 
>but the largest tire I can find for it is about 23".  This car has 
>positraction, and someone in the archives says that using a "donut" 
>spare with such a setup can ruin the posi.  Now a 23" tire is not a 
>"donut" tire, but it is a significant difference.  Would this be a problem?
>
>Thanks,
>
>John McMahon