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Location: Rochester, NY
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Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
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I have used thin chain ring bolt shims to effect wobble correction with mixed results. A lot of time, trial and error and that was when thin spacer/shims were easily available. I've whacked and pried dozens (likely hundreds over the years) of rings into acceptable straightness, as I mentioned before.
Holytrousers makes a good point about rotating the mounting of the RH arm on the axle flats 90* at a time to see which is the best WRT ring straightness. Andy
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AndrewRStewart