Freewheel Shiftable Uni?

Hmmm one problem I just thought of is chainline...but thats
overcomeable.

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Front derailers suck though, one little bump and they are all out of
wack.

Personally I cant make this kind of a design work in my head, but I also
have not had an opertunity to really look at the workings of the purple
phaze to see where extra slack is taken up. I assumed it was a fixed
gear set up with vertical drop outs to adjust tension on the chains. In
that kind of situation I dont know if it would be possible to shift. Do
you have an idea of how to tension the chain w/o a rear derailer kind of
system, I would assume you would need one with some heavy duty springs
to be able to keep the tension where you want it.

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I guess you could use a singleator with a wide wheel to cover both
"gears."

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I was thinking that an easier solution would be to create a way to lock
the spindle to the hub and disengage the jackshaft when you want to ride
a fixed gear. I'm not sure the best way to do this, but it seems
simpler then shifting the gears.

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right again, Daino! the easiest way is with a sprung lockpin on the hub
shell that can be pulled out to freewheel, and the spring will push it
back in to lock the hub again.

No one has been able to design a fixed gear with any kind of useable
idler spring. You'd be surprised how much backpedal force we can
create, and the chain looseness required to shift precludes the tension
required for a chain-driven fixed gear.
But then again someone please build a shiftable external fixed gear and
prove me wrong...!

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daino149 said:

*I was thinking that an easier solution would be to create a way to
lock the spindle to the hub and disengage the jackshaft when you want
to ride a fixed gear. I'm not sure the best way to do this, but it
seems simpler then shifting the gears. *

What if you used a nub button type thing to disengage and engage the
innards. Similar to the Shlumph unis.

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ive thought about this and i have been thinking it wouldnt really work
because when you are engaging back into riding mode from coasting mode
the pedals would start to have to turn when you engage

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unijuggler said:

*ive thought about this and i have been thinking it wouldnt really
work because when you are engaging back into riding mode from coasting
mode the pedals would start to have to turn when you engage *

So?

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*disclaimer: the above message was not intended to offend anyone. if you
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feel like it. also you are reading an internet newsgroup where not
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