If you think traction has nothing to do with wheel size then you have alot to learn. Wheel size also comes into factor witht he ratio of rpm's of the motor to the rpm of the tire surface and so forth.

So you are telling me pretty much every person that runs 9s or less in the 1/4 mile all use 15" rims for the hell of it.

And Yes I am talking about traction in the state of drag racing, not roadcourse racing or auto-x or anything else.