In a message dated 11/13/2005 2:35:59 P.M. Eastern Standard Time, firstname.lastname@example.org writes:
<much context removed>
>".....wide tires overall are likely to be faster than skinny tires which have HIGHER rolling resistance).
> Marcus Coles replies:
> You forget the important words "at the same pressure." At a given weight and pressure the contact patch is going to be pretty much the same area regardless of tire size, the wider tire has the rolling resistance advantage as the contact patch while the of the same area is shorter i.e. the flat spot is not as long. Due to structural reasons skinner tires generally can take more pressure which creates a smaller contact patch which can quickly overcomes the advantage of the wider tire.
Very true. Furthermore, I believe studies have shown that one does not have to go very fast before wind resistance will overcome any advantage the wider tire might have had with it's lower rolling resistance.