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Old 09-20-2012, 02:02 PM
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swood02 swood02 is offline
Officially Welcomed to the 'Fest
Location: Maryland
Join Date: Nov 2010
Posts: 238
Mein Auto: 2015 X35D M-Sport
Originally Posted by z51vette View Post
Interesting and unexpected fact.

When I got the car, the dealer told me they raised the air pressure in the tires from the factory setting. Today I was planning on driving the car on the beach, so I checked the air pressure before hitting the sand. I was a bit surprised, it was 42 in the rear and 39 in front. I aired down slightly below factory settings of 33/36 to 32.5/35.5. The car handled the sand just fine but when I hit the streets on the way back I felt the suspension was a bit harsher than what I was used to. The ride was a little more busy/choppy. The steering a little heavier. Just seemed harsher overall. I put the pressure back up to 38/41 drove on the same road back and forth and it smoothed out the ride quite a bit. I found this a bit surprising given the I would expect the opposite to be true.
I've noticed the same phenomenon on my 335d. When the tires are under inflated the ride is harsh; when they're properly inflated the ride smooths out. My car has RFT's.
2015 X35D M-sport

2011 335d: sold
2008 535xi: in lease heaven
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