Originally Posted by
canklecat
The cheap Vittoria Zaffiros on the bike now have only a mediocre rating from the rolling resistance review site, and much worse with pressure below 120 psi. Yet I have noticed that lowering the pressure doesn't seem slower and it's more comfortable. I'm wondering whether the reality of riding on chipseal and bad pavement makes those rolling resistance tests irrelevant to some real world conditions.
Many of the rolling resistance tests are being run on diamond plate, I think, to simulate rough riding conditions.
I'm surprised they don't just build a rig to tow around on roads at 25 MPH or so.