Hi Marek,guess I was coming from my python which uses a geared hub. Adding a second sprocket should be possible and you could still build like this. But you are right, considering a dérailleur configuration, two separate chains toward the hub are not possible without losing the gearing.
The tandem-drive would solve this. Gerald Am 11.01.2014 15:36, schrieb bnmm@xxxxxxx:
...so a new tube would be needed, see tandem-drive2.png- Marek On 11.01.2014 15:14, bnmm@xxxxxxx wrote:Hi Gerald,Besides the option off pressing on your thighs, obviously you cold add an additional crank set for the hands like this: Python_with_add_hand_driveWouldn't that require two synchronized gears? How about tandem-drive.png? The additional gear train (green) would be a direct transmission on the left side, so a tandem drive chain would be needed. Best regards, Marek--- Diese E-Mail ist frei von Viren und Malware, denn der avast! Antivirus Schutz ist aktiv. http://www.avast.com
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