Originally Posted by
asgelle
How is ignoring rolling resistance splitting hairs? There are two terms in the equation of motion that scale with mass: 1) the driving force due to gravity, and 2) the ******ing force due to rolling resistance. How can you justify including the first, but ignore the second? Perhaps you meant changes in the coefficient of rolling resistance which will depend on tire size, construction, and inflation pressure; but not on weight.
Sure, anyone with flat knobbies and grit-filled hubs is going to have a hard time keeping up with anyone on a slick bike,
but in this case who's to say which rider has equipment with more or less rolling resistance? For present discussion purposes we can assume they are the same for each, can't we?