The pressure on the sidewall and the TireRack spec are max pressure, not recommended.
Go with the owners manual as it is for the specific vehicle and tire size. I go with 30-36 or 29-35 cuz it feels better to me.
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Mike
04 Boxster S - Basalt/Savanna, 6sp, Carrera lites, hardtop
70 914-6 - Black over tan, original/stock
PCA since 1970
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