Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    BF Avatar Zombie Hunter Jseis's Avatar
    Join Date
    May 2012
    Location
    SW Washington state on the ocean!
    My Bikes
    1973 Motobecane Grand Jubilee, 1981 Centurion Super LeMans, 2010 Gary Fisher Wahoo, '03 Colnago Dream Lux, several older family Treks
    Posts
    1,007
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Elliptical at pro level

    http://cycletechreview.com/2012/news...our-de-france/

    http://www.noncircularchainring.be/


    And a Sheldon Brown link

    http://sheldonbrown.com/biopace.html

    If it does translate to an increase in effective application of aerobic power, then it makes sense that Froome would use it and his cadence and pedaling style are likely optimized for that effectiveness and in particular on steady state climbs.
    Last edited by Jseis; 07-07-13 at 11:26 PM.
    Amerika, Land of the Very Brief.

  2. #2
    Professional Fuss-Budget Bacciagalupe's Avatar
    Join Date
    Aug 2005
    Posts
    6,281
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Sheldon Brown's article is way out of date. Biopace failed in the market, and as far as I know no data supported its alleged benefits. (FWIW I briefly used Biopace chainrings, and did not find it beneficial in any way.)

    From what I can tell, the science is unclear. Some studies indicate there is no benefit, some claim a small benefit (2%). I don't know of any evidence that it's detrimental, either.

    Until there's solid evidence of the benefits, I for one remain skeptical.

  3. #3
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    38,998
    Mentioned
    20 Post(s)
    Tagged
    0 Thread(s)
    Rotor is a whole different shape than Biopace, if Froome likes it ,he makes it look like it makes a difference.

    Talented trained professional Racers are paid to make the gear they ride look like it is why they win.

    by those who make the parts ..

    only by having them repeat the same situation* with different stuff on their bike
    can any implications be drawn.

    *like not being caught in a crash, not getting a puncture.. etc.

  4. #4
    Senior Member
    Join Date
    Jun 2013
    Posts
    730
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Bacciagalupe View Post
    Sheldon Brown's article is way out of date. Biopace failed in the market, and as far as I know no data supported its alleged benefits. (FWIW I briefly used Biopace chainrings, and did not find it beneficial in any way.)

    From what I can tell, the science is unclear. Some studies indicate there is no benefit, some claim a small benefit (2%). I don't know of any evidence that it's detrimental, either.

    Until there's solid evidence of the benefits, I for one remain skeptical.
    If there was hard evidence of a 2% benefit (ie, 48 seconds on a 40 minute climb), then the whole peloton would be on them.

    I have a biopace ring on my single speed (sounds counterintuitive, but it's only ever pulling the same length of chain) and I've never noticed a difference in performance or feel either way.

  5. #5
    Trek 500 Kid Zinger's Avatar
    Join Date
    Feb 2013
    Location
    Spokane WA
    My Bikes
    '83 Trek 970 road --- '86 Trek 500 road
    Posts
    2,187
    Mentioned
    1 Post(s)
    Tagged
    1 Thread(s)
    I noticed a riding partner losing chains every time he went to the big ring on a downhill with biopace rings. He couldn't give the things away after some of that.
    Last edited by Zinger; 07-08-13 at 02:24 AM.
    "I never lost a race because my bike was too heavy".......George Mount

  6. #6
    Senior Member Garfield Cat's Avatar
    Join Date
    Oct 2004
    Location
    Huntington Beach, CA
    My Bikes
    Cervelo Prodigy
    Posts
    4,994
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Christie O'Hara did a research paper while at Cal State San Luis Obispo. The paper was on Rotor and tri athletes. I can't find it online but might have saved it on PDF.

    Google her name and perhaps you can find stuff on Rotor's elliptical rings.

  7. #7
    Senior Member busygizmo's Avatar
    Join Date
    Apr 2008
    Posts
    231
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •