Originally Posted by
Jaywalk3r
Such questions are beyond the scope of that study. They sought only to analyze rolling resistance. Hills and stops do not affect that.
As far as weight is concerned, the standard deviation of the weight of my commuting cargo is more than the total weight of my tires. I doubt I'm unique in that respect. Weight matters for racers, but not so much for typical commuters.
Weight matters as much more more than rolling resistance. I have been keeping records of all of my rides for many years and tens of thousands of miles, including average speeds, distances, times, bikes that I rode, etc. My data consistently show that my lighter bikes with narrower, lighter tires are faster than my heavier bikes with fatter tires. The average speed on my lightest bike is 2.5 mph faster than my heaviest bike. The correlation is almost linear, with speeds steadily increasing from my heaviest bike (touring) to my lighter cyclocross, sport touring and racing bikes.