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  1. #1
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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.

  2. #2
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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.

  3. #3
    . bbattle's Avatar
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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

  4. #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.

  5. #5
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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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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