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Old 08-15-16 | 11:34 AM
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joejack951
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From: Wilmington, DE

Bikes: 2016 Hong Fu FM-079-F, 1984 Trek 660, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2016 Islabikes Beinn 20 (son's)

Originally Posted by CliffordK
Why would that make a difference, or does it rely on the teeth being a multiple of 4 (32), and thus aligning with the arms?
I believe FSA's 30T inner rings are relying on a 90mm BCD as used on this crankset: FSA SL-k light Adventure Modular BB386EVO - FULL SPEED AHEAD

Pulling the teeth closer to 4 bolts by relying on a tooth count being a multiple of 4 doesn't work for 30T.

Gotta love the 'simplicity' of double cranks and now the proliferation of new BCDs and crank styles to overcome the inherent limitations of only having two chainrings, while still not addressing the lack of range. Triples FTW, as always
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