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"fixed" freewheel, variable gear?



 
 
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  #21  
Old November 3rd 03, 11:39 PM
KinkyCowboy
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Default "fixed" freewheel, variable gear?

On 3 Nov 2003 10:49:10 -0800, (Andrew
Webster) wrote:

(Qui si parla Campagnolo) wrote in message ...

Why not just weld a freewheel together, add as many cogs as you wish and then
stop to change the gearing, must have LONG dropouts for chain tension tho-

Peter Chisholm


If you have two power links in the chain you can add/remove a few
links easily enough, of course, quick gear changes are out, but worth
it for a long ascent.

Andrew Webster


Or use a double chainring and two sprockets (should be able to screw
two track sprockets onto the long thread of a 6/7 speed freewheel
hub). 42x15 and 38x19 for example gives 76" and 54" gears with no
change of length, and you could probably arrange a perfect chainline
on both combos with a bit of shimming. You might even be able to
change gear without loosening the rear wheel.

Kinky Cowboy

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  #22  
Old November 4th 03, 06:29 PM
David Damerell
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Default "fixed" freewheel, variable gear?

Ryan Cousineau wrote:
If you couldn't find one of those, another option would be the Schlumpf
two-speed "mountain drive" BB, which might work with a fixed gear:
http://www.sheldonbrown.com/harris/schlumpf.html


Nope. It can't withstand significant reverse torque.
--
David Damerell Kill the tomato!
  #23  
Old November 4th 03, 10:30 PM
ant
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Default "fixed" freewheel, variable gear?

KinkyCowboy wrote in message
Or use a double chainring and two sprockets (should be able to screw
two track sprockets onto the long thread of a 6/7 speed freewheel
hub). 42x15 and 38x19 for example gives 76" and 54" gears with no
change of length, and you could probably arrange a perfect chainline
on both combos with a bit of shimming. You might even be able to
change gear without loosening the rear wheel.


change gear without loosening the r.wheel? that means a pretty loose
chain. certainly looser than i would feel good running fixed.
  #24  
Old December 5th 03, 03:35 AM
Bill Patterson
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Default "fixed" freewheel, variable gear?

Do what the old guys did. Use a double sided hub. Put a small sprocket
on one side and a big one on the other. When you come to a hill. Get off
and turn the wheel around.


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