Originally Posted by
Campag4life
In bold. Is that true? I guess drag racers don't know what they are doing then i.e. sagging tire pressures with lower psi to increase rear tire contact patch for 'more friction'.
Elementary physics. Just like a kg of feathers weighs the same as a kg of iron.
Increased contact patch is due to the need for rubber to be sticky and not heat up too much (to melt) at the same time. So the pressure is applied over a greater surface. To put it simple. Also, terrain irregularities play a part - softer with greater contact patch should adapt to bumps and holes and oil drops more easily.
Maybe my previous post wasn't well explained, or this one. English is not my first language, obviously.
Here, quick Googling, the last paragraph:
http://www.dummies.com/how-to/conten...-friction.html