967 Snow wheels/tires on 958?
 

957 Snow wheels/tires on 958?
 

Screwed up the title...957 Snow wheels/tires on 958?

Wow that will be some interesting deal on that 2010 GTS with low miles for sale

If you can figure out width \ offset on your 957 wheels - You can look at the https://www.porsche.com/usa/accessor.../tyreapproval/ approved wheels & tires to see if it will fit

You can't use 18" rims on the new GTS. The GTS shares the 958 turbo brakes (390mm) and 19" "just" clear the caliper. 18" are a no-go unfortunately.

^I always appreciate your advice.

Would a 53 and 57mm offset affect me using 18s instead of 21s, it seems I will be ok otherwise ? I sumhow recall that my 21" wheeels have 4mm spacers but cant recall where I read this ?

Edited to add mine is a Diesel.

according to the Porsche document,I linked above - 2015+ GTS required 19"
2011-2014 GTS will take 18" with standard brakes, or 20" if ceramic brakes

I really don't care what the Porsche document says.. I own a '11 Turbo, same brakes as his GTS, and 19" clears the caliper by about 1/4". Porsche uses special flat wheel weights for the balancing. 1/2" smaller radius isn't gonna do it. And try to find someone who has run 18" on the 958 GTS. Since he owns the 18" it certainly might be interesting to try them on the 958, but I don't think there will be any joy. IF they fit over the caliper without actually scraping it I'd be surprised, and putting wheel weights on it? Not happening.

BTW - turbo/gts steel brakes = 390mm, the ceramic = 410mm, making the radius difference 10mm (0.4"). I've never seen 20's on the ceramics (all the ones I've seen have the sport-turbo 21" rims), but if we go by the logic of what you're quoting, it would seem 19" would fit the ceramics. They won't.

Just went and looked at the document you quoted. It said as of 2015 - Turbo/GTS - 19", 20" - and the original post is about a 2017 GTS. Ummm.. Porsche sez 18" ain't gonna fit. (Page 14..) I don't understand your point.

I gotta go with Don here. My '17 GTS wears 20" summer and 19" winter and there's definitely not a lot of clearance for the 19's on the front.

I don't think spacers would make enough difference as the barrel of the rims does not seem to 'taper' such that an offset would help clear the caliper. Now, I haven't measured anything to 'prove it' but I'm willing to go with Porsche's guidelines on this.

Sorry to hear health conditions are keeping her from enjoying the vehicles. Best of luck going through all that.

I am trying to say there is a difference in fit on 958 GTS pre and post facelift.

Please don't even ATTEMPT to mount/position the 18" set on the 958 GTS, you'll just start scraping everything up as the nice painted caliper starts scuffing the inside of the barrel of the wheel, and vice versa. Ugh.

You may well be correct, with the GTS particularly. The GTS has been sort of an 'odd man out' when it comes to equipment (engine, brakes, trim, etc).