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  1. #1
    Junior Member
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    Sep 2005
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    East Lansing MI
    My Bikes
    1974 Paramount White (Campagnolo Record) 1971 Schwinn Super Sport Kool Lemon (fifteen speed Shimano 600 Arabesque) 1971 Schwinn Super Sport Kool Lemon (single speed) 1970 Schwinn Breeze Campus Green (coaster brake) 1969 Schwinn Racer Campus Green
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    Schwinn Twinn Sport

    We recently purchased a 1979 Twinn Sport. I have several questions regarding the wheels used on these bikes. It seems that the front wheel hub spacing is 92.5mm, is that possible? Is that normal for a tandem? Peculiar to Schwinn tandems? Rear spacing seems to be 146mm which seems common for other tandems. I have now had the experience that others have had regarding tires slipping off the steel rims and consequent exploding tube. I have several alloy front wheels with hooked rims but they won't presently fit in the fork, could I maybe alter them to the spacing required? We really wanted to try this tandem out without having the wheels relaced to better, lighter rims. I would really like a better front hub, the rear has an Atom drum brake I would like to keep. In the long run I will probably fit Tektro long reach rim brakes front and rear and maintain the Atom as a drag brake for long downhills activated by a friction shifter.
    All comments appreciated.
    Brian McCall

  2. #2
    Tandem Vincitur Ritterview's Avatar
    Join Date
    Sep 2005
    Location
    Northern California
    My Bikes
    BMC Pro Machine SLC01, Specialized Globe, Burley Rock 'N Roll tandem, Calfee Dragonfly tandem.
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    Quote Originally Posted by bmc5733946 View Post
    We recently purchased a 1979 Twinn Sport.
    Brian McCall
    I don't know the answer to your question, but since you're here, is this a Schwinn?



  3. #3
    Junior Member
    Join Date
    Sep 2005
    Location
    East Lansing MI
    My Bikes
    1974 Paramount White (Campagnolo Record) 1971 Schwinn Super Sport Kool Lemon (fifteen speed Shimano 600 Arabesque) 1971 Schwinn Super Sport Kool Lemon (single speed) 1970 Schwinn Breeze Campus Green (coaster brake) 1969 Schwinn Racer Campus Green
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    It may be a Schwinn. Looks like hub brakes at both ends. I would bet the women are twins. There is a 1959 Ford in the background. What else do you want to know? I'm out of breath!!!
    Brian

  4. #4
    Hopelessly addicted... photogravity's Avatar
    Join Date
    Aug 2009
    Location
    Central Maryland
    My Bikes
    1949 Hercules Kestrel, 1950 Norman Rapide, 1970 Schwinn Collegiate, 1972 Peugeot UE-8, 1976 Raleigh Sports, 1977 Raleigh Sports, 1977 Jack Taylor Tandem, 1984 Davidson Tandem, 2010 Bilenky "BQ" 650B Constructeur Tandem, 2011 Linus Mixte
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    I don't know anything about old Schwinn Twinn tandems, but if you post these questions in the Classic & Vintage forums, I know there are at least a couple guys there that have (or had) them.
    --
    Ridding the world of derailleurs, one bicycle at a time.

    46 Hercules Roadster, 49 Hercules Kestrel, 50 Norman Rapide, 51 Hercules Lion, 52 Hercules Windsor, 56 Hercules Royal Prince, 61 Fiorelli Tandem, 67 Carlton Super Race (IGH), 70 Schwinn Collegiate (IGH), 71 Hercules, 71 STF Hercules, 72 Peugeot PX-8 (IGH), 76 Raleigh Sports, 77 STF Raleigh Sports, 77 Jack Taylor Tandem, Early-80's Mike Appel SC, 84 Davidson Tandem, Late-80's Alpine, 10 Bilenky "BQ" Signature Tandem

  5. #5
    Junior Member
    Join Date
    Sep 2005
    Location
    East Lansing MI
    My Bikes
    1974 Paramount White (Campagnolo Record) 1971 Schwinn Super Sport Kool Lemon (fifteen speed Shimano 600 Arabesque) 1971 Schwinn Super Sport Kool Lemon (single speed) 1970 Schwinn Breeze Campus Green (coaster brake) 1969 Schwinn Racer Campus Green
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    Photogravity,
    I reposted there this morning.
    I wasn't really sure where to put these questions. I had also posted them on the Schwinn forum.
    Thank you for the advice!!
    Brian

  6. #6
    Nigel nfmisso's Avatar
    Join Date
    Mar 2011
    Location
    San Jose, CA
    My Bikes
    1980s and 1990s steel: CyclePro, GT, Nishiki, Schwinn, SR, Trek........
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    Hi Brian;

    If the bearing cups in the hub are good, re-use the hub with a modern rim, I'd suggest a Sun CR-18 or Velocity Dyad.
    Nigel
    Mechanical Design Engineer

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