Originally Posted by
zigmeister
I guess we have a terminology issue here. Rolling resistance, what exactly is that defined as? Drag + friction? Factors affecting such? I don't know.
Drag is your biggest problem when on flat land. When going uphill, not gravity is the issue.
I don't know what "rolling resistance" means.
I take it to mean, basically where the rubber meets the road. Friction.
But, the topic is talking about "wind". Which I would take this to mean, we are talking about drag.
Rolling resistance is basically the energy lost towards deforming the wheels/tire frame, and overcoming bearing friction, for a closed cycle on a distance basis. It is independent of the wind speed. Mostly it comes from the tires. So when your tires get squished, it takes some energy. Some of that gets returned as the wheel goes around and the tire pops back again, but not all of it. Same for frame flex. Ultimately all of that energy is lost to heat.