crzy idea..

I've been eyeballing it for a month or two now... The idea of a multiple geared engine.. I always see multispeed bikes on eBay, and I was wondering if anyone out there has thought of the possibility of engineering a left side mounted shimano type derailleur... Ideally a 3 speed, one large low speed gear with big torque (like 60+ teeth) then the standard 36-44 tooth, then a small tooth for top speed (like 27 teeth).. I think the biggest trick would be making a chain guard to enclose the drive chain should it slip,break, and go flying..

is this possible? any thoughts?

if you look at the setup for a multi-speed pedal bike, they have a cartridge of gears and a swing arm that pulls the chain to the proper gear when you shift.. The question was: has anyone tried to make something like this for the drive-chain (left hand) side of the bike, as the derailluer (technical term for the swing arm) is a right-side mounted item..

yeah, i checked them out. not quite what I'm talking about.

something like this

shimano 10 sp casette - eBay (item 190333371339 end time Sep-13-09 06:49:52 PDT)


with this

Sram X.5 Rear Derailluer, Long Cage, Silver, 320 grams - eBay (item 330358959890 end time Sep-16-09 18:03:32 PDT)