I keep reading conflicting stats...
I think the wheel and tire sizes are the same for 2018 Turbo S and GTS
some say the wheel is 1/2 wider on the rears for GTS?

 

According to Porsche configurator, the rear wheels on the 2018 Turbo S are 11.5 inches wide, while on the 2018 GTS they are 12 inches wide. So, yes they are 1/2 inch wider on the GTS. BTW, fronts are both at 9 inches wide. Tires are the same size on both models, front and back.

 

but they wear the same size shoes so whats the point having a wider wheel if the tires are same size?

 

The latest Excellence magazine tested the Turbo vs the S4 vs the GTS4 and they concur the GTS4 has 12" rears. Porsche says for more traction.

So, your looking at the configurator, leaving the dark side and coming back into the fold?

 

I️ bought 1 and came back already.
Gts RWD W/rear wheel steering convertible
Loving it

 

The centerlock wheels are 12 inch in back. 5 lugs are 11.5 inch. Optional no cost in black or silver.

 

Yea . Thats weird