Quote:
Originally Posted by rmay635703
I think what is being lost here are the effects of rolling mass and aero.
So when driving down the road which trumps which
Rolling Mass + Aero or Rolling resistance by itself.
Obviously crap tires made of bias crap compounds won't score well.
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Compared to the weight of the vehicle, the mass of tires is a tiny fraction - it's impact would be minimal.
The difference in inertia between tires is also fairly small - especially when you consider the inertia of other rotating components.
Aero? The difference in aero drag due to tire width is also pretty small - and I've been able to demonstrate that the difference in RR due to width more than offsets the change in aero.
Bottomline: You can neglect everything else if you want to talk about tire size and its affect on RR. But you also have to consider that tire size has a small affect compared to the difference between tires (meaning make and model). Spend your time worried about tire make and model and not so much about tire size.