Like William said, the totally symmetric hub will add strength, a dual drive will deliver more torque for heavy loads, and you have a redundant system in case you break a derailer in the middle of nowhere. ;-)
Actually, they slapped it together with what they had lying around. I didn't ask why they had 2 drive arms and no left arms. jim On Jun 10, 5:51 pm, PATRICK MOORE <bertin...@gmail.com> wrote: > > > What is this, exactly? And why? -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bu...@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
