The Right Tire Pressure - 2015 Porsche Macan S Long-Term Road Test

2015 Porsche Macan S Long-Term Road Test

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2015 Porsche Macan: The Right Tire Pressure

July 09, 2014

2015 Porsche Macan

Remember our 2013 Porsche 911? Sure you do. It was silver, a convertible and the tire pressures were always out of whack. We've only had it a few days, but I'm thinking our 2015 Porsche Macan S is going to be the same way...

When our new Macan showed up the tire pressures were way too high. You could feel it. PitterPatterPitterPatterPitterPatter over every seam in the road and the ride suffered. My first assumption was the Macan had fallen on the wrong side of the comfy/sporty spectrum and Porsche had shot itself in the foot. My second thought was this is the way our 911 rode when its tire pressures were way off, so maybe someone at the Porsche dealer went to town on these ones, too.

Trusty tire gauge at the ready, I let the Macan cool down and went to check the pressures in my 70-degree garage. 41 up front, 42 out back. (The number was different than displayed here. Our gauge has been recently calibrated. I trust it.) The door jamb says 36/39 for all-season 265/45 R20 fronts and 295/40R20 rears. To the owner's manual!

As expected from a German car these days, the recommended tire pressure is split into two parts: Full Load and Part Load. We're not generally going 150 mph with passengers and cargo, so we go with Part Load which for the Macan S is 33/36. So that 41/42 from earlier was clearly just an inflator set to a specific PSI.

I dropped the tires down to 33/36 and went for a ride. Much better. As expected. We'll keep a tally of how many times Porsche Service resets these to something in the 40s.

Mike Magrath, Features Editor

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