Quote:
Originally Posted by theholycow
Jay, you are probably wrong about rolling resistance. Check the link in my sig. All other things being equal, the wider tire will almost certainly have less rolling resistance.
As for aero (and weight), the wider tire would almost certainly be worse.
ALS, why do you say that wider tires would hurt the handling?
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My logic is that the narrower tire has less surface area in contact with the road surface for rolling resistance to act upon. The wider tire has more traction and more surface area in contact with the ground. This seems to me to be a larger surface area for rolling resistance to act upon. Of course I haven't been a Physics classroom since the early 90's. I could be wrong. I would suppose that there is some sort of coefficient for rolling resistance that could be broken down to the square inch, and then be multiplied by the size of the tire's contact patch in square inches. I would figure that's why overinflating tires reduces rolling resistance. The tire gets harder (It does not flex as much), and the contact patch gets smaller.
-Jay
goofy1 
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