Bike Forums - View Single Post - Non-triple vintage 42T double as a middle chainring w/ triple Sora shifters?

04-17-15 | 10:06 AM

#12

ThermionicScott

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Joined: Aug 2011

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From: CID

Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)

Quote:

Originally Posted by FastJake

This is a little off topic but FWIW they did make a 50T Biopace ring in the 110 BCD (of which I have at least one) so something like 50/38/26 could theoretically be run on a 110/74 compact triple. I have a bike setup now almost like that with 48/38/26 and the aforementioned Claris triple FD which works well enough with a friction downtube lever.

Quote:

Originally Posted by Tim_Iowa

I stand corrected.

And I kneel, pleadingly, to take that 50t biopace ring off your hands!

IIRC, the stock configuration was to pair that 50T with a 46T inner for half-step-plus-granny. I wonder if anyone has compiled a database of all the BioPace offerings.

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