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Query on recommended tire pressure and weight front to rear?

7064 Views 8 Replies 7 Participants Last post by  Nyyyce&Eeeezy
The door card recommended tire pressure is 29 PSI front and 35 PSI rear on the 560SL. The weight distribution is heavier in front, about 55% front 45% rear. I thought that tire pressure should be directly proportional to load. So perhaps there is insightful expertise on this board to explain why the heavier front gets the lower pressure?

To add to this mystery, my 450SL door card said 32 PSI front and 26 PSI rear, with an approximate weight distribution of 57% front. So what is the basis for the OEM pressure differentials between front and rear across the 107 series? Anybody find good results with different sets of pressure?

Thank you for your ideas.
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Inside the door to my filler cap are listed the tire pressures. On one side are summer values, winter on the other, front and rear. Then it notes 'add 3 psi for speeds above 100 mph; subtract 3 for speeds under 100 mph.' In other words, I have to calculate the proper tire pressure, it is not listed.

I run 28 or so front, 30 or so rear, for comfort on rough roads.
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