Tire science

[Grant Lenahan]

What is the % difference in the circumference of the two tires - do the math. If its, say 1-3% you are ok for short to moderate distances. Remember, the differentials job is to allow different rotation speeds.  That said, constant differences accumulate heat. So 20 miles?  ok. 200? not so ok. Modest speeds.

Grant
On Jul 13, 2011, at 9:16 AM, doubldz at aol.com wrote:

> Hello All:
> 
> I just upsized the wheels on the 1990 V8 to 16s (from 15s). The spare is one of those compact deals and the well that houses it doesn't look like it could accommodate a full size wheel, especially a bigger wheel. If, someday, the Audi gods frown on me and I get a flat - what to do? Can I use the spare briefly or do I need a flatbed tow? 
> 
> And yes I do have AAA Plus ;-)
> 
> Dee
> 1990 V8q
> Pearl
> 
> Sent from The iPhone
> Put an end to Puppy Mills! 
> Adopt Don't shop. 
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