I bbelieve people get the wrong idea with regard to inflation and tire contact with the surface... It is a rotating mass, and the tire will look to bend, curve away from the edges when spinning, thereby creating less of a contact area with the surface. Is why there is speed ratings too. I don't think lowering inflation to extreme levels helps any at all and is a placebo effect. You want grip, get SNOW tires... Period. Deflating all seasons is just a problem waiting to happen as mentioned in an earlier post. I will deflate or inflate based on a LOAD in the vehicle... I thought I seen it somewhere, but here... You'll see what I mean. Correct inflation allows for correct contact...
http://www.tirerack.com/tires/tirete...e.jsp?techid=3
