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I had an opel astra 1.6 station wagon 98 recommended tire pressure was something around 28 now I have a fiat bravo 1.4, 97, much smaller and lighter car, why recommended tire pressure is 32? It’s so noisy and I all the time feel that tire pressure is too high but when I check it’s well below recommended pressure?

why recommended pressure is higher eventhough the car is much more smaller? please help. what’s the relation between car weight and tire pressure. Tire’s radius in both cars is 14