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09-24-20, 10:34 PM

#29

Roll-Monroe-Co

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Quote:

Originally Posted by Roll-Monroe-Co

OK, here we go:

1: pat. 1869 William Van Anden https://www.jimlangley.net/ride/bicyclehistorywh.html
1895 first derailleur patent Jean Loubeyre https://www.bikeradar.com/features/w...ears-invented/
2: pat. 1899 The New Protean: Whippet derailleurs
3: pat 1904 Edmund Hodkinson's Gradient Terrot derailleurs
4: pat 1912: Terrot Cycle Company Terrot derailleurs
5: marketed 1912: Boizot Boizot derailleurs
6: marketed c. 1960 ... Regina? Velo-Retro: Campagnolo Timeline
7: marketed c. 1979 by SunTour
8: marketed 1991 by Shimano
9: marketed 1997 by Campagnolo
10: marketed 2000 by Campagnolo
11: marketed 2008 by Campagnolo
12: marketed 2018 by Shimano and Campagnolo
13: marketed 2020 by Campagnolo

Data:

Year Speeds
1869 1
1899 2
1904 3
1912 4
1912 5
1960 6
1979 7
1991 8
1997 9
2000 10
2008 11
2018 12
2020 13

A Poisson count model works ok, though the relationship is nearly linear. I get:
G = number of gears
Y = year
G = exp(-22.6028+0.0124Y)
Sorry fellas, but science don't expect a 14-cog cassette before 2033.

Last edited by Roll-Monroe-Co; 09-24-20 at 10:36 PM. Reason: typoe

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