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RUF 19" cast wheels and nearly new (less than 600 miles) Continental Extremecontact DW tires will fit Boxster and Cayman.
The wheels have been professionally powder-coated in the correct RUF silver to an extremely high standard with the tires then remounted and balanced, ready to fit. They are blemish free and in flawless condition. First picture is the wheels as fitted on my 993 before they were restored.
Specifications:
Wheels: Front 8.5Jx19 ET56 and Rear 10J x19 ET66
Tires: Front 235/35 ZR19 and Rear 285/30 ZR19
I had them on a 993. They fitted the arches perfectly with about 1 to 1.5 inch lowering - you would need spacers on the rear of a Cayman / Boxster to push the wheels out enough, probably 20mm.