Originally Posted by
Sir Lunch-a-lot
Um... I'm not exactly sure how you figure that wider tires have a lower rolling resistance, since there is more tire in actually in contact with the road. More tire, greater resistance. If fatter tires made you go faster, I'm pretty sure that road bikes would have fat tires.
Great list otherwise
Here is the best description I have seen on the web.
http://www.schwalbetires.com/tech_in...ing_resistance
Tire pressure determines the size of the contact patch. The width of the tires changes the _shape_ of the contact patch. What determines rolling resistance appears to be the length of the contact patch which is longer with narrow tires.