[Andy M]

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I was using 19 on Pzero N spec. Changed to 18 street/track wheel on MPSS increased width to 245/40/ front plus -2 camber and 275/40 rear More grip on 18 and much smoother ride. Front and rear equally grippy no longer rear goes first.

 

[Andy M]

I have a 2013 Boxster. The original 18x45 Dunlops were poor handling and wearing out after 25,000 miles and 5 years. I replaced them with Michelin Sport 4S but in 40 aspect since 45 is not made.
Now my car feels like a new great sports car, especially in handling, cornering (no more skids), and noise. I have calculated my milage and speed are off 3-4%.