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  1. #1
    Senior Member
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    should I modernize my 87 Schwinn Circuit?

    Not so long ago I picked a frame from the rafters from one of my lbs. My original intentions were to make it into a fixie, which I did. I have been happily riding it along this way for several months now. But lately, I have been getting the itch to build it up into a geared bike. however, I don't want to use retro components, I really want to use modern sti style shifters and brakes.
    So I wanted to get some opinions from the forum.
    As the title says, I have an 87 schwinn circuit. Its made from some columbus steel and fits me very well. I would still like to keep it on a budget, so I have been thinking shimano 105 would be adequate.

  2. #2
    Decrepit Member Scooper's Avatar
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    Quote Originally Posted by big boy phil
    Not so long ago I picked a frame from the rafters from one of my lbs. My original intentions were to make it into a fixie, which I did. I have been happily riding it along this way for several months now. But lately, I have been getting the itch to build it up into a geared bike. however, I don't want to use retro components, I really want to use modern sti style shifters and brakes.
    So I wanted to get some opinions from the forum.
    As the title says, I have an 87 schwinn circuit. Its made from some columbus steel and fits me very well. I would still like to keep it on a budget, so I have been thinking shimano 105 would be adequate.
    The Circuit is a great bike. I wouldn't hesitate to update the components if it were mine.

    It's probably got 126mm rear spacing, so if you want to put a 9 or 10 speed cassette on it, you might have to cold set the dropouts and rear triangle spacing.
    - Stan

  3. #3
    feros ferio John E's Avatar
    Join Date
    Jul 2000
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    www.ci.encinitas.ca.us
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    1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
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    Barcons and a 7-speed freewheel would be an economical combination which would still permit gear changes with both hands on the bars.
    "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

  4. #4
    Vintage Steel
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    Apr 2004
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    I've done a similar project with my Miyata Seven Ten. I'm running a 130mm rear with 8 speed gearing. I'm actually still using the Suntour Cyclone stuff (no problems with it) and running friction. I guess it's a little metro-retro!

    I think the used 8 and 9 speed Ultegra can be found for good prices and might be a good way to go. I've heard good things about the new 105.
    1986 Miyata Seven Ten
    1984/1985 Schwinn World Tour (featuring full 600 grupo!)
    2002 Giant OCR Elite 0 (with SRAM Rival)

  5. #5
    ThreadKiller Evoracer's Avatar
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    I have an early '86 Schwinn Circuit myself and have been researching some upgrades. Less wheels, Ultegra 9spd can be done for less than $250 using Dura Ace 10spd downtube shifters. It'll keep some of that vintage feel/look without the brifters.

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