There is an optimal tyre width for rolling resistance and it is wider than 25c, so Ed is indeed right. This is only to a point though and the rolling resistance of a 300c tyre is higher than a 23c. I think the optimal was around 30c.
@kerley started
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There is an optimal tyre width for rolling resistance and it is wider than 25c, so Ed is indeed right.
This is only to a point though and the rolling resistance of a 300c tyre is higher than a 23c. I think the optimal was around 30c.