Here's where I got my wheels... mine are copies, not original, but I think they sell both. I went with Carrera III because I thought they'd be the easiest to clean - and I don't enjoy that task in warm weather so I knew I wouldn't in the cold!

http://www.wheelenhancement.com/index.php?t=Wheels

 

Obviously narrower width is better, but does dropping diameter from 18->19 for the winter set make a big difference aside from saving a bunch on the tires? I was planning on running my 19s this summer and putting winter tires on the stock rims and then going with 20s next spring for my summer set.

 

Generally, the shorter the sidewall, the pricier the tire...

 

I know, just wondering if the winter performance suffers as well with a short sidewall, all other things being equal.

 

Thanks, I will check it out.

Most guys go to the 18" with not as low profile because it is more forgiving if you hit a pothole.

My 1st choice is to stick with my stock 19" rims, but I will cry if I destroy a pricey 19" Turbo rim.

Howard

 

Snow tires are essential, all season tires are actually 3 season tires. Once it gets below 5 degrees Celsius your summers or all seasons will get hard and lose traction even on dry pavement.

 

Performance is definitely limited with winter tires in dry weather. I found out (almost the hard way) one winter during a dry, 55* day. If you can put 18" tires on, that's the best bet.

This thread had me do some research on Tire Rack - I found a package for the 997 C4S with 18" wheels (turbo twists lookalikes) and 235 fronts/265 rears.