O Symmetric Users

Discuss light weight issues concerning road bikes & parts.
KWalker
Posts: 5869
Joined: Mon Dec 28, 2009 8:30 pm
Location: Bay Area

by KWalker

This might sound weird in the road thread, but what do the people that use these on their roadies use on other bikes i.e. cross or mtbs? I want to get the same feeling on all of them, but there is simply no way (I've tried) to get MTB or cross versions in the US.
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Gramz
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by Weenie


Omiar
Posts: 218
Joined: Wed Dec 14, 2011 8:20 pm

by Omiar

Their available in EU. Just have someone buy them and send over to US.
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stephen@fibre-lyte
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by stephen@fibre-lyte

Not quite sure why you can't get them in the US if they're available elsewhere. Have you tried contacting Osymetric USA?

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fa63
Posts: 2274
Joined: Mon Feb 19, 2007 7:26 am
Location: Atlanta, GA, US

by fa63

I understand Osymetric USA bought the rights to the design and are having the rings manufactured in the US instead of importing them. It looks like they haven't made it to manufacturing MTB rings yet.

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Wingnut
Posts: 1862
Joined: Sat Jun 23, 2007 12:41 am

by Wingnut

I'm curious...ShimaNo's Biopace failed miserably years ago, so why is O Symmetric any different?
"It's not the destination...it's the ride!"

Machinenoise
Posts: 147
Joined: Wed Jun 22, 2011 9:39 pm

by Machinenoise

@wingnut

they are effectively 90degrees out of phase with biopace. A few other tweaks on shape etc, but thats the crux of it. bigger gear in the power phase, smaller one at the dead spots.

HillRPete
Posts: 2292
Joined: Tue Apr 12, 2011 8:08 am
Location: Pedal Square

by HillRPete

Machinenoise, really? Did biopace have a higher gear in the dead spots? I seem to recall it wasn't like this, but it's been a long time ...

Zigmeister
Posts: 921
Joined: Mon Jan 24, 2011 8:09 pm

by Zigmeister

Wingnut wrote:I'm curious...ShimaNo's Biopace failed miserably years ago, so why is O Symmetric any different?


Right, what the above poster said. Biopace had it off 90 degrees. Where qrings and orings have a different approach each.

I swear by my qrings. I might not be faster, but getting rid of the dead spot, especially on climbs, made a big difference for me. Never go back to round rings personally.

Not so sure about the osymmetric, they are the extreme of qrings. Harder to setup also.

KWalker
Posts: 5869
Joined: Mon Dec 28, 2009 8:30 pm
Location: Bay Area

by KWalker

Lets not start a debate about ring shapes.

I contacted the US distro with 0 response but the above posters are correct. I also received a reply from a Euro distro that used to carry the MTB version and they pretty much can't get them anymore because of how unpopular they were. Apparently the bumpiness of mtb shifting when combined with the shape just caused too many chains to drop.

I was maybe thinking of just getting Q-rings for the MTB and trying to get the closest orientation, but I'm still curious as to what O-Sys users do in this situation.
Don't take me too seriously. The only person that doesn't hate Froome.
Gramz
Failed Custom Bike

boots2000
Posts: 1441
Joined: Mon Oct 15, 2007 9:28 pm

by boots2000

Get in touch with Tom Slocum- http://www.hscycle.com/
He can make you some. They will be much higher quality than osymetric rings too.

KWalker wrote:Lets not start a debate about ring shapes.

I contacted the US distro with 0 response but the above posters are correct. I also received a reply from a Euro distro that used to carry the MTB version and they pretty much can't get them anymore because of how unpopular they were. Apparently the bumpiness of mtb shifting when combined with the shape just caused too many chains to drop.

I was maybe thinking of just getting Q-rings for the MTB and trying to get the closest orientation, but I'm still curious as to what O-Sys users do in this situation.

yongkun
Posts: 407
Joined: Sun Sep 19, 2010 10:19 pm

by yongkun

Any SRAM users care to share their experience with Osymmetric installation? I've got a friend who is having difficulty tuning it to his Force bike, probably also due to his small frame, chain angle. I am keen on it too.

Machinenoise
Posts: 147
Joined: Wed Jun 22, 2011 9:39 pm

by Machinenoise

Yongkun, what sort of problems?? I've never used SRAM (full stop) but have heard of issues with it and o-symmetric. I've setup and used them on about 6 different bikes now, and know about most of the issues. Front derailleur trimming does help on some bikes, and the position of the derailleur due to the tube angle or braze-on position can affect their usage. Most problems can be fixed though.

s4one
Posts: 55
Joined: Wed Dec 10, 2008 2:23 am

by s4one

Does osymetrics help with climbing? i know that the power section has more teeth so it makes more power but is harder to pedal. this makes me think qrings maybe better soley for climbing purposes

topflightpro
Posts: 819
Joined: Tue Jan 13, 2009 2:35 am

by topflightpro

A buddy of mine here in the U.S. has them and likes them a lot.

PM me if you want me to try to get you info on how he got his.

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WMW
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by WMW

s4one wrote:Does osymetrics help with climbing?


Ask Froome and Wiggins...
formerly rruff...

by Weenie


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