Will Shift Kit work with internal hub transmission?

IF YOU HAVE A MULTI SPEED BIKE YOU CAN SHIFT A fd BIKE (IF MOUNTED ON REAR WHEEL)

Sorry Mikey, that's not what we mean.:cool:

We want the engine directly connected to the multi-speed cassette or internal hub, so pedals and engine goes thru the same single bike chain.:geek:
 
5-7, how about replacing the bike chain with just a heavier chain if you do a Nuvinci? That way you get to keep the stock sprockets.
I ordered some heavier 1/2 inch chain for my moped from McMaster Carr. It fits on bike sprockets- has some slop sideways but sure won't break!
 
5-7, how about replacing the bike chain with just a heavier chain if you do a Nuvinci? That way you get to keep the stock sprockets.
I ordered some heavier 1/2 inch chain for my moped from McMaster Carr. It fits on bike sprockets- has some slop sideways but sure won't break!

Professor, that's what I'm gonna do, sorta. Changing to 8mm chain and sprockets. Pocketbike freewheel mechanism threads directly onto NuVinci hub, then any 4-bolt T8F sprocket bolts on. 8mm chainring sprocket also bolts up at the bottom bracket. I already have a 72t 8mm sprocket and just ordered 8mm chain and 36t sprocket for the rear NV hub.

Right now I have 8mm engine sprocket and chainring. So I'll have 8mm drivetrain throughout. Chains and sprockets should be strong enough, since they're made for pocketbike engine power.:geek:
 
Another reason I'm switching to internal hub is because the chain will not move laterally(side-to-side)throughout its operation. Whenever I watch the bike chain move thru its 8 gearshifts, I wonder:

HTF does it stay on its sprockets?

With no lateral movement, this should cure my chain problems.

I am SO TIRED of stopping and resetting the chain on every ride. Sure maybe it's my not having the chainline dead-on.

I wish my bike would give me a break.

I think that my bike is trying to kill me.:whistle:
 
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The NuVinci hubs are a joke. You can't shift them under load unless you REALLY twist the grip shift hard. They are really not that great.

This bike has a Shimano Nexus 3 speed and works great. The parts are easy to find, they are tough and they perform better that Sturmey's.

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He made a jack shaft that mounts behind the seat tube. It's very fast and works great.
 
Thing is, shifting the multi-speed options (dérailleur or internal geared hub) does absolutely NOTHING as far as a friction drive is concerned. A friction drive has only one ratio - drive spindle/outer tire circumference. That's all it can provide, except for slippage. Like a child's tricycle, an FD system is direct drive - no effective gear choices.

Now, it is quite possible to build an FD system that would be capable of at least two, and possibly more speed ratios, and "shift in motion". It isn't even all that complicated to do.

As far as the durability of most internally geared hubs goes, think about what they are designed to do. To wit: stand up under the torque load of an adult human being standing on the pedals, pulling on the handlebars and bearing down - a much greater amount of torque than most any small engine will ever produce.

The biggest problem is transmitted vibration and the design of all but the NuVinci hub - they all use internal cogs. The greater the number of gears provided, the thinner those internal cogs tend to be in construction, and the more susceptible they become to vibratory failure.

So, using good motor mounts that lessen vibration transmission, and the SBP jackshaft system (which further isolates engine vibration from the rear hub just by its design) should not cause undue problems.
 
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Might not be complicated to you, but it is to me. Also not worth my time since progressing from friction drive to shift kit.

It'd be nice to see you fab this up, though.
 
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