Anton has it exactly right, on significant climbs each pedal stroke creates an acceleration and each complete rotation has two dead spots where power is not transmitted. On flats inertia masks this phenomenon but on a hill gravity magnifies it.
I get numbers, in an earlier part of life I was a corporate financial guy. A long time ago I accumulated 24 graduate credits in statistics and calculus. I really like numbers and its often the first thing I look at when making a purchase. But numbers can never answer this question because riding a bicycle is a subjective experience. My bikes have 29, 33, and 38 mm tires on them. I doubt I can measure the performance difference but I experience them differently and choose them to create a different kind of experience for different kinds of riding. Michael Westford VT, where it has barely broken -10 in the last 36 hours and is headed for -30 tonight. (and I need a new furnace!) On Thursday, January 2, 2014 9:05:31 PM UTC-5, Anton Tutter wrote: > > When you're climbing a steep grade, you're not maintaining a constant > speed. If you graphed your speed over time, with time on the x-axis, you'd > see something resembling a sine wave. But your speedometer may not > register a change in speed because its averaging the speed over an > integration interval of probably several seconds. In this case I would > agree that rotational weight can clearly be felt, much more than static > weight. > > Anton > > > On Thursday, January 2, 2014 5:45:13 PM UTC-5, Steve Palincsar wrote: >> >> >> Really? If you are maintaining a constant speed (i.e., velocity) then >> the rate of change of the velocity (which is the definition of >> accelleration) must be zero, right? I don't see any measure of slope in >> the equation or the definition. >> >> I think the real questions here are: can you actually feel a 1 lb >> difference, and does a 1 lb difference in weight make a measurable >> difference in climbing performance. A rough way to test this would be >> to do the ride with, and without, a full water bottle. Now this may be >> just that I make a poor princess, not being able to notice the pea and >> all, but I've never felt the bike to ride any different when I have full >> vs empty water bottles, and that's considerably more than a 1 lb weight >> difference; and I suspect that there's enough natural variation in my >> power level that adding or removing 1 lb would be unnoticeable among the >> random fluctuation. >> >> But then, perhaps my proprioception isn't any better than my >> pea-detecting skills, and other more refined, better-bred and highly >> tuned observers might notice things that I do not... >> >> >> >> >> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/groups/opt_out.
