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			Hi All, 
I’m new here, bought my 2001 Boxster S a couple months back and been thinking about upgrading its stock 17 inch wheels since then. 
I came across used 981 18-inch ones a few days ago that come with good tires too, but even after checking the fitment in the tool linked here and on another site, I honestly still can’t understand if the new setup is going to work, and what I might still be missing, so would really appreciate input from experts. 
 
Current setup 17” 
Front: 7 ET 55; 205x50 
Rear: 8.5 ET 50; 255x40 
 
New setup I’m looking to buy 18” 
Front: 8 ET 57; 245x40 
Rear: 9 ET 47; 275x40 
 
From what I understand, I’ll need 15mm spacers in the front. Is that correct? 
Not sure about rear. Anything I should be worrying about in terms of the tires size? 
Thank you all so much!
		 
		
		
		
		
		
		
		
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