overdrive gear.

[vegaspaddy]

have a look at this piece of engineering,

http://cgi.ebay.com/overdrive-recum...kparms=72:552|39:1|65:12&_trksid=p3911.c0.m14

you can peddle your bike along when going top speed 30 -35 that is pretty cool.

he also has alot of cool stuff for converting bikes to trikes although it looks like he makes most of the stuff for recumbents.

 

[eljefino]

Looks like a jackshaft without that good a purpose.

Just because the gearing is available, doesn't mean one can pedal at such speeds.

 

[stude13]

its a geared cvt. wild.

 

[greenevegiebeast]

short jack shaft too high of a price