Quote:
Originally Posted by ard
Wide tires in snow and slush are a 'no no' since they tend to ride up on top, reducing control... paradoxically this is PRECISELY what you need in soft sand.
Reduced pressure in ANY tire will increase the contact patch- just physics. 30 psi with 900 lbs on that wheel = 30 sq in.... take that same 900 lbs but with 20 ps... 45 sq in. Not that simple, but illustrative. Releasing air will increase the patch in both length and width.
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Several of us who have driven in soft sand noted above that we will take the narrower tires (with reduced pressure). This refers to soft sand, not packed sand, when I at least would want the wider tires. Not sure about the other posters above who regularly use their X5s to get to beach houses.
While we discussed reducing pressure in the posts above, and I agree with your concept of internal pressure being equal to ground pressure, the vehicle in the video has RFT, so your illustrative example won't apply.
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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