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PostPosted: Wed May 01, 2013 4:23 pm 
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If you watch the entire stage he was on normal rings.
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PostPosted: Wed May 01, 2013 6:07 pm 
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Yep. He was on compact round rings when the front mech went awol.

Apparently, his spare bike had a standard 53/39 setup, so he was badly over-geared for the rest of the climb. Seems like a fairly big oversight by the team.

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PostPosted: Wed May 01, 2013 6:58 pm 
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There are quite a few other riders in the peloton running the Rotor Q Rings that have a much better shifting than O'Symmetric ones. Haven't seen any issues with them. Now that Rotor has released the QXL rings that have an more extreme ovalization (16% vs 10%) they may be a better option.

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PostPosted: Wed May 01, 2013 8:27 pm 
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Ah, they (the rings) looked all black in that tiny gif.


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PostPosted: Wed May 01, 2013 9:02 pm 
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Despite running oval rings myself, I'm not convinced they do anything and there is 0 scientific evidence with valid (i.e. non-SRM) test data with error removed on them. From someone I talked to the Sky trainers and riders determined no perceivable performance difference and got sick of the shitty shifting and ditched em in the off-season (minus Froome and a few TT bikes)

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PostPosted: Wed May 01, 2013 9:26 pm 
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True, I haven't seen any scientific data showing increased power output but that's not the reason I use them. I like them mainly for when the road points up. For me, that's where they excel. That also seemed to be the case for when we would see them on the pro's bikes.

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PostPosted: Wed May 01, 2013 9:32 pm 
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stella-azzurra wrote:
About his comeback LOL

"It's wrong to say I've retired. I haven't closed the door on cycling and don't know what the future will bring," Petacchi told Gazzetta dello Sport.

"I've got nothing to hide, otherwise I would have just kept quiet. It just didn't make sense to carry on, I haven’t got the right motivation. I felt okay early in the season and only missed out on some results due to making some mistakes. I tried some new things and rode Flanders and Roubaix but then I thought: 'Now what? Ride the Tour? To do what?'

It seems Petacchi no longer wanted the pressure of being a team's nominated sprinter who is expected and paid to win sprints. However, he is interested in a different role.


http://www.cyclingnews.com/news/could-p ... ad-out-man" onclick="window.open(this.href);return false;


Petacchi disappointed after the UCI block his move to Omega Pharma-Quick Step
http://www.cyclingnews.com/news/petacch ... quick-step

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PostPosted: Wed May 01, 2013 9:40 pm 
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Even if the rings don't improve power but if they simply feel better that alone may justify their use to some riders.

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PostPosted: Wed May 01, 2013 10:00 pm 
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I tried most of them, from osymetric, Doval and Rotor to the extreme Ogival, all of them provide a different feel but not a power increase, actually no increase at all but a feel of using more effective, longer, arch on which apply a smoother downstroke (from 0 to -20/25° with 0 orizontal crank).
Doval and Osymetric feels, personally (n=1) the best compared to the others; these 2 brands are quite similar in shape too but only the Korean rings have pins and a (normal) thickness that osymetric miss, these last actually being noticeably flexy and out of 2 sets, both were misaligned (lateral chain movement even without load, e.g backpedal).

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PostPosted: Wed May 01, 2013 10:08 pm 
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there are some scientific articles about these rings, and they show how rotor shape is not good enough compared to osymmetric in terms of performance, shifting precision not taken into account. they mainly bring a more round pedal stroke, not more power directly, but it can help in steep hills, for some riders, not for all. It's a biomechanic change, rather than a direct power output improvement, otherwise everyone would run them, which is not the case... No magic here neither unfortunately...

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PostPosted: Thu May 02, 2013 3:06 am 
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I run Rotor Q-Rings simply because I got em for cheap. They feel cool I guess, but I really don't notice at this point. Would never pay full price.

Used the O Sys for a bit and wasn't happy with the shifting or the noise they made and could probably never use them again because of that.

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PostPosted: Thu May 02, 2013 11:06 am 
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Sky are going to be looking good in the TTT at the Giro on these!

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PostPosted: Thu May 02, 2013 11:09 am 
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edited ^ You beat me to it

And now sir Brad got a new ride

Pinarello Bolide (what's with the name jezuss..) 15% more aero and 5% lighter than the Graal.

Image

http://www.pinarello.com/eng/pina_bolide.php" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;


Too many curves... I prefer Canyon's minimal approach. So Wiggins is still on those "Silly Rings" after all.


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PostPosted: Thu May 02, 2013 11:34 am 
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Basso out of Giro.
Not that he would have been a contender.
Might give Cam Wurf a chance to show his wares.


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PostPosted: Thu May 02, 2013 11:47 am 
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Wiggins on Di2 training just before the Giro

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