Tandem Cycling - Schwinn Twinn Sport
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08-22-12, 05:32 PM
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.
08-22-12, 05:44 PM
We recently purchased a 1979 Twinn Sport.
I don't know the answer to your question, but since you're here, is this a Schwinn?
08-22-12, 06:03 PM
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!!!
08-22-12, 09:21 PM
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.
08-23-12, 07:54 AM
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!!
09-01-12, 02:52 AM
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.
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