Oval chain rings for ultegra spider

big booty
Posts: 315
Joined: Thu Feb 26, 2015 3:33 pm

Oval chain rings for ultegra spider

Postby big booty » Fri Nov 24, 2017 11:16 am

Does anyone make oval chain rings for an ultegra crank? Having cycled most of my life with the old shimano biopace Ive upgraded to a new bike with an ultegra crankset. Properly set up the old biopace (they got the indexing wrong when they introduced it in the 80s) provides a far superior pedalling stroke so Im want to see if its possible to buy oval chain rings. Not wanting to replace the whole crankset, just the chain ring.

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Re: Oval chain rings for ultegra spider

Postby P!N20 » Fri Nov 24, 2017 11:20 am

Google: Osymetric

http://www.cyclingweekly.com/news/produ ... work-28044
https://cyclingtips.com/2012/09/osymetr ... r-miracle/

Edit: sounds like they're a bit different to Biopace, but see how you go.

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