Joined: Nov 2006
Posts: 19,810
Likes: 597
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...
Think of the bar end shifter as three parts:
1, the shifting gizmo
2, the aluminum 'pod' that mounts to the bar
3, the expandable tubular thing that goes inside the bar.
You can mix and match any of those. I'd check whether either #2 or #3 will fit your bar. Certainly you can file #2 down, but you probably don't have to. If #3 doesn't fit, that is more complicated (you have to disassemble it and file the flat spots of each of the expanding parts).
I have some bar end shifters made for aero bars, which are narrower, and had to shim them to fit in my bars. I can trade you the narrower bits if you like. That is, I can trade you my narrower parts #2 (which are black) for your wider #2, and my narrower #3 for yours. Your #1 will fit on either one.
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