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How do I know if rim specifications for winter tire/rim set match my Porsche?

  • 2018
  • 718 Cayman
Mileage: 
1 500
Wheels and Tires
Stroudsburg, 
Pennsylvania

I'm looking for a set of rims for a cold weather setup for my Cayman that came fitted with 19' wheels. I found a decent TireRack Wheel/Tire package featuring the Michelin Pilot Alpin P4 N-spec, but I'm confused about the specs. The wheel set that TireRack matches to my Cayman for this package has an offset of 54 front, 42 rear, versus the vehicle's OEM wheel offsets of 57 and 45, respectively - and with a front wheel width of 8.5". The OEM front wheels are 8J. Is this offset/width combo within tolerances for clearance in the wells, or is there somewhere else I should be shopping for these to find the exact match in aftermarket wheels? The setup will be strictly for temperature concerns, the car won't be seeing snow. Any advice is greatly appreciated, thanks!

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