I am a 76 year old who bought a 2006 Porsche Cayenne S, Titanium
edition in December 06.

Since I put on a little less than 20000 miles, I put it in the shop
with the dealer for its first service appointment. I noticed the tires
showed wear and asked service to advise how many more miles I would
get out of them. To my surprise I was advised that the tires should be
replaced and advised the service manager to replace them.

Previously I have owned and put hundreds of thousands of miles on 3
different Mercedes and one BMW. sedans. Two of them were 8 cylinder
vehicles. I do not recall any of them having the tire wear I
experienced with the Cayenne but I consider the Cayenne the best car I
have ever driven. I figured the tire wear. like the fuel consumption
was the price of "fahrvergnuegen" of the Cayenne.

After replacing the tires, I did a little research on the net and
discovered the original and replacement tires were summer Pirelli
Rosso high performance tires not recommended for driving in snow or
freezing weather and replacement at even less than 20000 miles on the
Cayenne was not unusual

We live in Southwest Georgia and get no snow but we have family in the
mountains of central Pennsylvania where they get plenty of snow and we
intend to be driving up there in November and December over the
holidays and expect to be doing so in the coming years..

I guess it would make sense to invest in winter tires for the trip up
there and then replace the winter tires with the summer tires when we
return to Georgia for the rest of the year. When both tires have to be
replaced I guess I could consider all season tires depending on the
performance sacrifice.

My question is if I do get two sets or tires for the two seasons
should I also get an additional separate set of wheels or could I
alternate the tires between the existing
single set of wheels. Since I have titanium wheels, I would assume
they are expensive.

I would appreciate any advice along these lines