RobertL wrote:Wheels make a difference, too, even on road bikes.
I upgraded from some old Mavic Aksiums to some new Campag Zonda C17s. I put the same tyres back on and pump them to the same pressure.
I'm not sure whether it is the slightly wider rims, or just different construction in general, but the new wheels give a much plusher ride.
Making a few mathematical assumptions, a 2mm increase in internal rim width will add about 5% to tyre volume.