Evening all,
I just wanted to come back to the rolling resistance issue. I understand now what Michael was saying, not that he was unclear, I just didn't read the black and white!
So a fatter tyre will have a lower resistance at a given pressure, but the key 'Real-life factor' is that you will always run a thinner tyre at higher pressures. Unless you don' t want to!?? for whatever reason. Hence in a real world scenario a thinner tyre will have a lower RR.