Adding gears?

[Fogcity123]

New to this. I'm sure it doesn't work this way but can someone explain why a gear hub (or whatever it's called - gears set internally in the rear hub) wouldn't make these motorized bikes have more then one gear? Also, what is a two speed "kickback" hub?

 

[Wild Bill]

The geared hubs do give the bike more than one gear and the ability to shift. Theres also the Sick Bike Parts shift kit that runs the engines power thru the bikes normal pedal drive chain and allows you to shift the rear derailleur. I use the SBP shift kit giving my bike 8 gears. The geared hubs dont handle much power though. Im running an SBP shift kit with a KTM clone and its holding up to the power so far.

 

[wheelbender6]

I will refer you to the epistle of the late Sheldon Brown, patron saint of bicycle knowledge. The link for internal gear hubs (like Nexus) didn't work. Here is a link to the writings of St. Sheldon. Click on Bicycle Technical Info and find some great info.
http://sheldonbrown.com/

 

[5-7HEAVEN]

New to this. I'm sure it doesn't work this way but can someone explain why a gear hub (or whatever it's called - gears set internally in the rear hub) wouldn't make these motorized bikes have more then one gear? Also, what is a two speed "kickback" hub?

Are you referring to an motorized bicycle with left-side sprocket? Gears won't work with the engine unless you use the right-side sprocket.

If you could reverse the hub, it will only freewheel.

 

[Fogcity123]

So it would only work if you, perhaps, install the engine reversly and forgo the pedals all together?
Also, the other question, how does the "kick back" system work when referring to an internal hub two speed?

 

[Fogcity123]

Never mind about the reverse engine install question - the beers are getting to me. So, how does the Sick Bike gear adapter work?