Joined: Nov 2006
Posts: 19,810
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From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
To measure the angle, I place two cotters together, flat to flat, threads opposed, and measure the total thickness at various points. If the angles of the cotters are complimentary, the outer edges will be perfectly parallel. It doesn't really matter if the angles are exactly the same, as long as they are complimentary.
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