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Dec
18
revised Why can't the gear ratio be something like 100:1? Is it practically possible?
added 184 characters in body
Dec
18
answered Why can't the gear ratio be something like 100:1? Is it practically possible?
Dec
17
comment Why can't the gear ratio be something like 100:1? Is it practically possible?
fredrompelberg.com/upload/algemeen/Wereldrecord_fiets.JPG
Dec
17
comment Why can't the gear ratio be something like 100:1? Is it practically possible?
1899, at 63+ mph, by Charles "Mile-a-minute" Murphy. The current absolute speed record is held by Fred Rompelberg at 167 mph. He used a double reduction gear (70/13 connected to a 60/15 for a total gear ratio of 21.5) and his wheels were 18 inches in diameter.
Dec
7
revised Bottom bracket with built-in internal hub - does this exist?
added 477 characters in body
Dec
2
awarded  Nice Answer
Nov
19
comment How are the categories for climbs decided?
I used the official TdF website for the name of each climb, its category, length, and gradient. Given those data, it's simple to calculate the elevation contours.
Sep
17
answered Source for statistics from pro cycle races
Aug
21
awarded  Yearling
Aug
21
comment Is vehicular cycling legal in France?
Nice answer. Could you add a reference to R414-2 and R414-4-IV? I believe the latter in particular is relevant to the question.
Aug
21
awarded  Good Answer
Jul
7
awarded  Guru
Jun
13
comment Is there a simple way to measure, record, and use wind resistance or tail winds?
Very nice. Two small correction: in part 2, air resistance varies with the square of air speed. Therefore, the power needed to overcome that air resistance approximately varies with the cube of speed (actually, (ground speed)*(air speed)^2 ). And, wind doesn't alway cancel out over the same route. Wind often has a pattern determined by geography and season, and wind speeds follow a Weibull distribution so, for example, you can end up with more extreme headwinds in the afternoon than tailwinds in the morning.
Jun
10
comment Is there a simple way to measure, record, and use wind resistance or tail winds?
Yes, the iBike (and other bicycle power meters) was discussed in this bicycles.stackexchange answer.
Jun
10
revised How do bicycle power meters work?
added 1373 characters in body
Jun
10
comment Is there a simple way to measure, record, and use wind resistance or tail winds?
Actually, we can measure all of those individual factors. However, measuring them all is either hard or expensive, and the OP's question was whether "there is a simple way" to do this. I was struggling with a way to write a simple response to a simple question but your short response is superior to the long (and growing) answer I was working on so I'm going to upvote yours and abort mine.
Jun
9
comment Is there a simple way to measure, record, and use wind resistance or tail winds?
There are, but they're of limited usefulness because you'd then need to "subtract" your ground speed from the indicated air speed to get the net speed of the wind. But since you're mostly interested in accounting for the wind speed in order to get a better sense of performance gains, there are other ways to measure that. I'll work on an answer.
Jun
8
comment Is there a simple way to measure, record, and use wind resistance or tail winds?
Is your question about measuring wind, or is it really about measuring performance improvements in the presence of wind that confounds the measurement? That is, there are anemometers that can measure and record wind but that's not particularly a bicycle-specific question.
Jun
5
awarded  Enlightened
Jun
2
revised What's the efficiency of hub gears compared to derailleurs?
added 169 characters in body