Found these on the web. They come in 20X11 and 20X8.5. Made for porsche 997. Price seems pretty good $499.00 for rear and $479.00 for front wheels.

Oz racing clams the weights are 24lbs for rear and 21lbs for front. They remind me of the Kinesis wheels a little.

 

I haven't seen them on the street, but I have looked at them on TireRack's web site. I agree, they look a bit like the Kinesis F110. Do they come in 19's? Personally, I would not want to go to 20" rims.

 

Agreed 20" rims would be a BIG mistake in my opinion. In fact, if I were getting new wheels I'd go with 18"

 

those are nice looking wheels and OZ makes a great product. I'd stay with 19's though.

 

Some pretty tight angles. May be hard to keep clean in all those corners. F110's have a little softer angles. Just a thought.

 

My rear TIRES are more expensive than that! MPSC in 305/30-19 are $514 each on Tire Rack.

 

I had OZ Superlegerras in 9x18 for my M3 track wheels (PSCs). Can't imagine why anyone would want 20s - I can't wait to swap the 19s coming on my 997s for some 18s (BBS, Forgeline, etc.) shod with PSCs or RA1s.

I found a 997 - 997S comparison done in Japan by some top P-car race driver. He liked the 997 and when he took out the 997S loved the car, but hated the 19s and thought they should have stuck with 18s for the S.

When I started deliberating the 997S purchase, I asked several dealers why Porsche went 19 and the response was unanimous - the marketing department got the better of the engineering department. People want "bling" and the enthusiasts lost out. One guy in the know said the engineers even had to modify certain aspects of the car to make the 19s work because the engineers originally contemplated 18s...

 

I was under the impression that to a point, larger wheels enhanced handeling at the expense of ride comfort. I suppose larger diameter wheels will be heavier, and hurt performance, and I suppose also that once the car is unable to handle rough surfaces due to the larger wheels, handeling would be hurt. I'm surprised though that this happens going from 18's to 19's. Can anyone explain it a bit more to me?

 

Those 20's are lighter then the stock 19's but, the weight is farther away from the center. I have read that a 20 inch tire was about a pound lighter then a 19. I think 20's look great but, if you are more concern with performance go with 19's or even 18's( they say they out perform the 19's)

 

Wow, I know so little about it, but have read so much over the years. I'm one of those guys like DeNiro in Ronin - not that interested in the technical specifications "It's just a tool". Or like Cruise in Days of Thunder - he has no idea about how the car works, he just drives the wheels off it.

In my case I've been driving 18" OZs with PSCs on the track for 3 years now (after transitioning from street tires on oem wheels). All of the research says "18s are superior". Part of it is the package weight of the wheels and tires. Part is the desire for some sidewall flex (18" has some, 19" less, and 20" has almost no sidewall). Another factor is the availability of tires in 18" vs. 19". I'm not sure there's much difference in contact patch - a 25" diameter 295mm wide tire in 18" should be the same as a 25" diameter 295mm wide tire in 19" - just less sidewall. My guess may be that in a 19" version with less sidewall, the point at losing grip might be more pronounced than in 18" because of the lower sidewall flex - you'd be either "on" or "off" with the grip. Just a theory - I really don't know for sure.

 

Well, you know more than I do, and it makes some sense. Seems like it is a somewhat complicated "equation". Thanks Ron.

 

Those wheels can't be compared to the Kinesis F110s. These are cast; the Kinesis are forged. Big difference in terms of strength (and price), which is especially necessary if going with aspect ratio of 30 with 20" wheels.

Wheels should clear the brakes, and ideally not be any bigger...lower profile tires don't enhance handling. As mentioned, weight is one issue, but with a good forged wheel vs stock cast, that might be offset. The bigger issue is that the tires are part of the suspension, and without some compliance in the sidewall, the contact patch is sacrificed over any road imperfection. A common reference is any racing series...none use low profile tires, simply because they are about vanity...nothing more.

And, of course, there is the increased risk of wheel and/or tire damage with less sidewall flex in a ultra-low profile tire.

 

Thanks Alan, kinda what I figured. Isn't there some point though were too high a profile can sacrifice handeling for compliance? I'm guessing somewhere around a 50 or 60 series?