I measured the length from the ground to top of the rim and I got 62cm (35psi) on the rear and 61.5cm (32) on the front. I reduced the rear to match the front and I got close to 32psi. Is this too low for the rear tires 315/35? It feels very smooth comparing with 35psi.

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4.8is 2004 imola red
4.8is 2005 Black on Black - DINAN/2 sold
4.4 2004 X5
2003 330xi
2008 328xi - sold
4.4 2000 X5 - sold