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  1. #1
    Senior Member MrCjolsen's Avatar
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    Nov 2004
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    Surly Cross-Check, '85 Giant road bike (unrecogizable fixed-gear conversion
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    Updating an old Miyata 110

    So I have this old Frame/fork + derailleurs, shifters, brakes, levers, bottom bracket, left crankarm, and seatpost.

    BB and headset turn real smooth, and the brakes and shifters work fine. No rust and the frame seems straight. My 700c wheelset I want to use on the bike fits fine. So I'm good to go. I'd like to build it up with everything I have in my garage, since the main reason I bought it was to use as a platform for some old parts I have that I'm not using and which I'm too lazy to sell.

    I'd like to run it as a 9 speed.

    The thing is that if I put on my rear wheel with a 9 speed cassette, the rear derailleur doesn't quite line up with the largest and smallest cog. I'm not surprised. The bike probably came as a 6 or 7 speed at best.

    What's the limiting factor? If I put on the 9 speed Ultegra rear derailleur that I have, will the shifters be able to pull it across all 9 cogs? Or will I need different shifters? If so, I have some old suntour barcons. Will those work?

    Finally, if I remove the largest cog from a 9 speed cassette, could I run it as a 7 or 8 speed with the current shifters and derailleur?

  2. #2
    that bike nut BikingGrad80's Avatar
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    Jul 2007
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    2010 Motobecane Immortal Force 90' Trek 1400; 90' Trek 850; 06' Trek 520; 01 Iron Horse Victory
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    The cogs are wider than the rear der was originaly adjusted for so the two screws (h and L) that determine how far out and in the rear dérailleur can travel need loosening so that the dérailleur can move farther to reach the outer and inner cogs. The shifters if indexing will not work they have a certain number of clicks for the number of cogs and the clicks are spaced for that number of speeds. If the Shifters are simple friction or have a simple friction mode they will be fine. Also you need a narrower chain to run 9 speeds.

  3. #3
    Senior Member MrCjolsen's Avatar
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    Surly Cross-Check, '85 Giant road bike (unrecogizable fixed-gear conversion
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    The shifters are not indexed, but ratcheted. Old Suntour, most likely.

    Good to know. I have lots of 9 speed stuff, but nothing for 6-7-8.

    Basically, I want to set the bike up as a geared road bike and see how it runs and fits me. If it's good, I'll keep it like it is or make it a fixie. If doesn't fit me, I'll sell it to a guy I work with who needs a new commuter.

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