>tire rolling resistance test are done on a bumpy surface Which ones are? The ones at bicyclerollingresistance.com aren't road-like-bumpy at least, and that's

>tire rolling resistance test are done on a bumpy surface Which ones are? The ones at bicyclerollingresistance.com aren't road-like-bumpy at least, and that's the most commonly cited page I know of for rolling resistance.