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David Millar (Garmin) riding some sort of Biopace type chainring?

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David Millar (Garmin) riding some sort of Biopace type chainring?

Old 07-17-10, 12:35 AM
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David Millar (Garmin) riding some sort of Biopace type chainring?

I just noticed that David Millar was riding some sort of Biopace type chainring while watching a recording of yesterday's stage. Anyone familiar with what he's using and why?
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Old 07-17-10, 12:40 AM
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I did some googling and found:


Source: https://tbtaward.wordpress.com/2010/0...ly-chain-ring/

https://www.osymetric.com/
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Old 07-17-10, 12:44 AM
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My understanding is that its supposed to help the rider pedal quicker over the top and bottom of the revolution. Something like that. I thought it was primarily used on TT bikes.
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Old 07-17-10, 12:59 AM
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That looks quite a bit more hardcore than biopace, but then again I didn't find biopace to be very noticeable.
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Old 07-17-10, 05:07 AM
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Similar to what's on the Cervelo Test Team bikes, they use 'Q-Rings'

https://www.rotorbike.com/nueva/ingles/road_qrings_130bcd.htm

https://www.cervelo.com/en_us/testteam/testteam-bikes/
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