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  1. #1
    rj987652003
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    gearing on 6 speed cassettes?

    What was the smallest typical cog on a late 70's suntour equipped road bike? I road one a few days ago and even in top gear didn't seem very high.

    Did road bikes back then commonly have a 12 tooth cog (high gear) in the cassette like road bikes today.

  2. #2
    cycles per second Gonzo Bob's Avatar
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    The smallest cog for Shimano and Suntour 6-speed freewheels was 13 although I'm pretty sure there were some other brands out there that could take a 12.

    The smallest cog for non Dura-ace Shimano 6-speed freehubs was 12. I think Dura-ace could take an 11. Suntour never offered a 6-speed freehub.

  3. #3
    Senior Member sydney's Avatar
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    Quote Originally Posted by rj987652003
    What was the smallest typical cog on a late 70's suntour equipped road bike? I road one a few days ago and even in top gear didn't seem very high.

    Did road bikes back then commonly have a 12 tooth cog (high gear) in the cassette like road bikes today.
    Could have been a 13 and even 14 was common.

  4. #4
    rj987652003
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    It must have been a 14 because I could ride up hills sitting down in the highest gear with that bike.....talk about worthless gearing!!!! What Am I supposed to do on flat ground...spin it at a really cadence for hours on end!!!

  5. #5
    feros ferio John E's Avatar
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    The original late 1960s and early 1970s SunTour freewheels had a 14-tooth minimum. The SunTour Winner had a 13-tooth minimum, as did the Reginas and Atoms of the same period.

    To me, a 14-tooth high is NOT worthless gearing! The early 1970s Peugeot PX-10s had the same 100-inch 52/14 top gear as most of the other 10-speeds of that era. I use 13-tooth high cogs now only because I also use smaller outer chainrings.

    My top gears are:
    Bianchi: 50/13 = 104 inches
    PKN-10: 48/13 = 100 inches
    Capo: 50/14 = 96 inches
    Schwinn: 48/13 = 96 inches (26" wheels)
    UO-8: 45/13 = 93.5 inches

    I rarely feel the need for a higher gear, but I am also comfortable spinning at, say, 100 RPM.
    "Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
    Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
    Peugeot: 1970 UO-8, S/N 0010468
    Bianchi: 1981 Campione d'Italia, S/N 1.M9914
    Schwinn: 1988 Project KOM-10, S/N F804069

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