Assembly

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Brakes and tires: roadworthiness check
Inspect safety-critical wear items and replace only what the measurements justify.
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Plan

Parts
Checklist
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Record wheel sizes/offsets and tire size, age codes, condition and tread depth at all corners.
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Verify a compatible matching tire set against Porsche’s current approval list and the wheels actually fitted.
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Measure pads and rotors against factory limits; inspect hoses and calipers.
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Review brake-fluid service history; plan a flush if due or undocumented after confirming the required fluid.
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Verify parking-brake operation.
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Check braking behavior during a controlled post-inspection road test.
Do not assume this car needs rotors, calipers or a wheel-size change. Record findings before selecting those parts.
Reference: https://www.porsche.com/usa/accessoriesandservice/classic/tyre-approval/