Timeline for Why are most bicycle gears designed to have so much overlap
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 15, 2018 at 14:31 | comment | added | Emyr | Nuvinci hub is about 2.5kg, and uses a tilting-ball type CVT, typically 70-89% efficient, and up to 380% range. Rohloff Speedhub 1.8kg, 526% range, efficiency 95-99% "comparable to a derailleur". Shimano Alfine 1.6kg, 307% over 8s or 409% over 11s. From what I can see, Alfine and Nuvinci are about the same price, but Shimano products and spares are far easier to source. | |
| Jun 15, 2018 at 9:59 | comment | added | Zach Lipton | Alternative 1c: infinite gears :) | |
| Jun 14, 2018 at 4:05 | comment | added | mattnz | goatlink and radcage's are a hack to get derailleurs deisgned for max. 36 tooth cassettes working on wide range cassettes. Derailleurs designed for wide range cassettes work fine. | |
| Jun 14, 2018 at 0:10 | comment | added | Perkins | I once saw a German-made internal hub gear being advertised that was boasting 100 gear ratios. Needless to say it was exorbitantly priced, but an impressive piece of machinery nonetheless. | |
| Jun 13, 2018 at 18:55 | comment | added | gerrit | Alternative 1b: stick the gear in the bottom bracket. | |
| Jun 13, 2018 at 17:16 | comment | added | Grigory Rechistov | These days, all three major bike gear manufacturers (SRAM, Campagnolo and Shimano) sell or at least have announced 12 speed systems, with ranges up to 10—50 and 10—52. Instead of increasing the range, Campagnolo uses 12 gears to decrease steps between adjacent gears. | |
| Jun 13, 2018 at 16:36 | comment | added | dwizum | Well put - to rephrase your first paragraph, the intent of the 3 x 7 gearing arrangement show in the question is NOT to have 21 usefully spaced ratios. Rather, it is to have three "sets" of 7 ratios each, with each set intended for a different general use. | |
| Jun 13, 2018 at 14:13 | vote | accept | user37078 | ||
| Jun 13, 2018 at 12:38 | history | answered | Emyr | CC BY-SA 4.0 |