O,SYMETRIC chainrings

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1. Where do you buy ?.
2. 30년 전에 나온 기술
3. It seems like oval chainrings cause more problems than they give benefits. Ok so there is a weak spot when we pedal but so what? When pedaling normally at a cadence of say 60 or more, the pedals flow back into the power region quickly. Also imagine a ratcheting system where as soon as we leave the power stroke region, the crankset would freewheel around until it got to the other power stroke region. It would be very distracting and hard to ride (especially when standing on the pedals), but an important point is our legs would not get much rest cuz we would always be under load. When pedaling a round chainring, we actually get short rests between power strokes which is good. Perhaps for a long range bike trip, the opposite of this design (back to the old style Shimano oval chainring) is better cuz it gives our legs a longer rest between power strokes.
4. The chainrings look really odd to me, the oval-shape seems more pronounced than rotor.
5. does this lesson surging like when burst starting from a stop using full power? I notice on a circle sprocket, after I finish a full down stroke on one side and switching to other leg There is loss of torque on the wheel.(surging like)
   Does this elliptical sprocket stop what I am trying to describe?
   
   I've also tried to think about pedals being spring loaded like where they move closer and further from the sprocket to also create an elliptical type motion.
   
   I would like anything that can assist quicker switching from led to leg on full power applications that reduce or eliminate surging. Any thought anyone?
6. Love em,use a 54/44 on my TT bike and 38/52 on the road,great rings
7. is it hard to change the gear ?
8. Repeat yourself much?
   Try stopping your wheel before you talk
9. Oval chainrings are completely pointless. The chain at the top and bottom has to jump up and down TWICE per revolution, your poor legs have to speed up and slow down twice per revolution. And the poor rear derailleur has to take uo, let go, take up, let go of slack - again twice per revolution. An the poor front derailleur.... I'm sure it makes a difference, though. Psychologically. Where there's money....
10. About the climbing efficience, I know that different parts of muscles r used when climbing compared to flat pedaling. U need much strength of lower back in climbs. When u climb, oval chainring make u use less effort in lower back, and make it more like on the flat. Maybe that's the reason that it helps climbing.
11. Not unless you have the correct type of chain tensioner
12. I thought Q-Rings are the only product on the market like this (crazy expensive). 
13. Most surprising, i had 1.5" radius change, yet derailleur oscillation was almost nothing... Thought that was odd, originally worried i would need to lengthen chain....
14. I made up asymmetric sprocket back in 94-95... Pulled my sons in a trailer, one big hill was a bear- it really helped a bunch with power at moderate speeds.
15. Thanks..but i have since converted my bianchi back into a road bike and am now running the old shimano BIO-PACE
16. Sorry, I missed that. You would need a rear derailleur. The chain tension changes through the pedal stroke. A chain tensioner wouldn't do the trick as they don't move to take up slack on the chain.
17. no...its a single speed :) no shifting for me lol but thanks for the comment..
18. If anything, it would work better. I have heard they don't shift as well as 'normal', circular chian rings. 
19. So would this work on my single speed bianchi?
20. Hi, I never had a knee problem prior to the O'symetric, I've done close to 50.000 Ks on them (2 sets of O'symetrics rings so far) and and i still don't have any knees or ankle issues yet? hope this help. thanks for watching.