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hb81
climber
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Aug 12, 2015 - 09:58am PT
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Yeah, looking at it in slowmo I see he's already skidding sideways when he comes into frame and then loses control completely.
Maybe hitting that car was a blessing in disguise even, he would have gone straight into the spectators behind otherwise. Or, if they'd manage to dodge, the trees then.
And yeah, the motorbikes stopping where they did was a really bad choice.
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Gunkie
climber
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Aug 12, 2015 - 10:36am PT
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He's feeling good...
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John Mac
Trad climber
Littleton, CO
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Aug 12, 2015 - 11:37am PT
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Froome was using Talo's osymetric (non-round)chain rings, which he claims provides him a 5 percent advantage. They look a little different when he is spinning.
The tour of Utah crash was really bad. Glad he is okay.
At the Red Rocks century ride I did on Saturday I was coming down a hill and a cyclist in front of me was in the ditch. Crashed at high speed. Carbon forks snapped in half. We did what we could for him but he died on impact.
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The Call Of K2 Lou
Mountain climber
North Shore, BC
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Aug 12, 2015 - 01:49pm PT
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Froome was using Talo's osymetric (non-round)chain rings, which he claims provides him a 5 percent advantage. They look a little different when he is spinning.
All the oval chainrings in the world are no replacement for souplesse.
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bhilden
Trad climber
Mountain View, CA/Boulder, CO
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Aug 12, 2015 - 04:10pm PT
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Regarding's Matt Brammeier's horrific crash at the Tour of Utah....
there were a lot of extenuating circumstances. He was off the back of the main peloton so, he was going very fast trying to get back on. Also, because he was off the back, he was having to deal with getting around the team cars and support vehicles. This causes riders to take bad lines. All this adds up to a very dangerous situation.
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Craig Fry
Trad climber
So Cal.
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Aug 12, 2015 - 04:40pm PT
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Osymetric – Gimmick or Legit?
http://cyclingtips.com.au/2012/09/osymetric-gimmick-or-miracle/
At this year's Tour de France I met an interesting gentleman named Jean-Louis Talo. He was carrying a set of these wacky looking chainrings that I had seen around so I struck up a conversation. I had seen them being used on most of the Team SKY bikes as well as knowing that a few other pros were using them which started to pique my curiosity. As it turns out Jean-Louis is the inventor of Osymetric and he was happy to explain them to me.
The Dead Spot
Jean-Louis Talo is a biomechanical engineer who created the Osymetric chainrings 21 years ago. He understood the theory of “the dead spot” and wanted to improve the efficiency and dynamics of the pedaling cycle. What is this mythical dead spot? The theory states that it is the weakest part of your peal stroke where the crankarms are in the 12 and 6 o’clock positions . Imagine a piston at the very top and bottom of its cycle. There is significantly less power being generated at this transitional point. The shape of the Osymetric rings attempts to concentrate your pedaling power where your force is at a maximum, while effectively reducing the load where your power input is at a minimum. This decreased chainring radius helps you go faster through the dead spot. For example, for a 56T (Osymetric) at the top position (the dead spot) it is not a 56t, it is equivalent to a 52t (easier to think of it being the same diameter as 52t at this position). So, where you are at your weakest, the chainrings are at their smallest to help you go through that quicker. Where you are strong is where the maximum diameter of the chainring is. At the end you have a constant speed of rotation.
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