Replacing a Partly Worn Tire?

[Grant Lenahan]

At worst, you need only two (one axle). I think i would do that with a tire that is effectively 4/7th worn out (9mm new, 2mm dead)

Nothing awful will happen if you replace one, but there will be a difference in grip, noise, feel, braking, etc - in addition to some very small delta in O.C. You cna do the math - i'd guess its < 1/2%

Grant

On Apr 27, 2010, at 7:41 PM, Stephen Kormilo wrote:

> Bummer. One of the tires on my 2002 A4 quattro received a sidewall 
> puncture that cannot be repaired.
> 
> What is the group's advice re: replacing a single ~half-worn tire with a 
> new one?  There is ~5/32" of tread depth left (~3/32" to the wear bars) 
> on the tires, so I am not inclined to replace them all, especially at 
> ~$240 each installed with all taxes. Will the difference in diameter 
> between the new tire & the old ones cause driveline problems, or is the 
> difference inconsequential? Are there any other factors that could cause 
> problems?
> 
> The tires are Bridgestone Potenza RE960AS in 215/55x16 size, if that 
> makes any difference.
> 
> Awaiting your wise words.
> 
> Stephen Kormilo
> Nanoose Bay, BC
> 
> 2002 Audi A4 3.0QM - Silver
> Departed:
> 1998.5 Audi A4 2.8 - Silver
> 1985 Mazda Rx7 GSL-SE - Black
> 
> email: stephen at kormilo.ca
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Grant Lenahan
glenahan at vfemail.net