brawlo

Actually no, not WRONG! That's a very small sampling comparison to make your assumption and it doesn't take much further reading to find out that yes, 28mm tyres roll better, but as the tyres get larger, the trade off to carcase weight negates the rolling benefit and as such. The trade off actually steepens rapidly as the tyres go past 28mm. From there, you can look at tread types and pressures, but when comparing red apples with green apples, the 23-26mm range that the pros use is where it's at for overall fast riding purposes. They put a lot of money into that research, so pay attention. How a tyre rolls is only a small part of the equation.