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Unread 08-05-2013, 12:57
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Re: Highest traction wheels

Quote:
Originally Posted by MICHAELABICK View Post
I believe some of your statements are incorrect. Usually, the only variables that affect traction are coefficient of friction and weight. Because wider wheels just mean that the same weight is spread over a larger area, you have the same amount of traction. This is different when roughtop tread and carpet interact, because the roughtop "locks" in witht he carpet and increses the amount of traction you have with wider wheels. This is also like drag racing, where they heat up the wheels so that they "stick" to the ground and wider wheels have more traction.

To answer the OP's question, I have heard that colsons have the most traction on flat surfaces.
I think there are a couple of misconceptions here. There contact area will actually not be increased by that much with a wider wheel. It sounds odd, but the pressure that would be applied over a thinner wheel is now spread out over a wider one. That lower pressure doesn't allow the tread to expand as much along the wheel. However, because your width is greater, the contact area is roughly the same.

Second, drag racers have wide tires solely because of heat. You need big tires to dissipate it all. The stickyness that happens does, in fact, increase traction because it now brings in adhesion (your coefficient of friction is now >1). It literally is pulling the car down when this happens. However, in our situation, our wheels aren't producing near enough heat to do any of that.

Another thing to remember is that friction is very inexact. It's been seen in some circumstances that the coefficient of friction can change with respect to load (which goes against classical friction theory). There may be many other factors that come in to play as well.
 


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