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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 12-23-08, 11:06 PM   #1
WashWizards727
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Rampar FF System

I want to covert my Rampar R-4 into a fixed gear. It is a 12 speed from the late 70's or early 80's (1982?). I read that the ff system would be unsafe because of the freewheel in the bottom bracket, but with a fixed gear bike, wouldn't I remove the freewheel anyway. There is a lockring on the casette that I have to get off, but could I take off the freewheel before I take off the lockring. Also, where can I find a 3/32 track sprocket with 18 or 20 tooth for the hub that is threaded, not splined. No store seems to have it.
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Old 12-23-08, 11:22 PM   #2
dayvan cowboy
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there are very few track cogs that are splined, not threaded.

sheldonbrown.com, you seem to have a lot of questions, that site will answer most if not all of them.
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Old 12-24-08, 09:15 AM   #3
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You'll need to take the lockring off to get the cassette off. Figuring out which tool you'll need to get in order to get that lockring off may be a bit difficult but your LBS should be able to figure it out.

On this page you'll find lots of threaded cogs: http://sheldonbrown.com/harris/fixed-sprockets.html

Have you read this? http://sheldonbrown.com/fixed/index.html
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Old 12-26-08, 06:42 PM   #4
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thanks for the help. I figured out the freewheel is actually part of the bottom bracket, which needs some very special tool to remove, so I think this bike will become a singlespeed rather than a fixed gear.
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Old 12-26-08, 07:18 PM   #5
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Quote:
Originally Posted by WashWizards727 View Post
I want to covert my Rampar R-4 into a fixed gear. It is a 12 speed from the late 70's or early 80's (1982?). I read that the ff system would be unsafe because of the freewheel in the bottom bracket, but with a fixed gear bike, wouldn't I remove the freewheel anyway. There is a lockring on the casette that I have to get off, but could I take off the freewheel before I take off the lockring. Also, where can I find a 3/32 track sprocket with 18 or 20 tooth for the hub that is threaded, not splined. No store seems to have it.
IIRC...

The rear hub is actually a conventionally threaded hub with a special cogset that has no freewheel mechanism as the freewheel is of course housed in the bottom bracket.

They are a rather interesting system as you can shift gears while coasting.

I helped convert one to an ss by removing the freewheel and ghetto fixing a single cog in the rear but converting one to a fixed gear would entail changing the bottom bracket to a conventional one.
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