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PIT BITS - 2019 Val di Sole World Cup Downhill Bike Tech
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12 comments

c50 IMG 20211027 155910 1655061393
Primoz
5 years ago
It's supposedly used to dampen vibration. You dampen vibration by tuning the mass or using appropriate materials (foams and other, usualy polymer materials that have a high internal damping coefficient) between two components. Sticking shiny stickers randomly around the bike will do nothing.

No actual data needed, just the basic knowledge of vibrodynamics of structures.
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Dr. Sylesej
5 years ago
These supposedly dampen small vibrations, thus making the bike faster.
In order to dampen vibrations you need to absorb and dissipate the energy in the vibrations. That's a fact.
However, you need a mechanism to dissipate said energy. Your shock is compressed between two points forcing fluid through small holes which heats the shock, playdoh is heated when worked, piezoelectric crystals transform mechanical energy into electrical.
Axxios-tech has not disclosed the mechanism that performs this function. And extraordinary claims require extraordinary evidence.
The best evidence I could find is a Swiss high school that has found that they can decrease the amplitude of vibrations in a plate by applying the stickers in the right position. Something you could also achieve with bubble gum.
With that said, if the goal was to decrease vibrations, by any whatever small amount, it wouldn't be impossible to achieve with a sticker. A highly viscous fluid in a sticker placed in a location with shear strain would dampen vibrations. It would do so by a very small, but measurable amount.
But this ain't it. The only function this sticker has is to make people who don't understand the premise pay for it.
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jcook
5 years ago
I’m highly skeptical of these as being nothing but snake oil. With that being said, in theory if it was a heavy enough sticker and you loaded the entire bike plus it’s constantly changing loads and a sprinkling of non linear critical interfaces (tires, the entire human body) into an FEA simulation, figured out your first vibrational mode and the resultant peak displacements, you could, in theory, place these such that they increase the that first vibrational mode and reduce displacements.

Now, you’d need to do this on each and every frame design and size, and it would vary with the mfg tolerances of the carbon frames. Oh, and it’s prohibitively expensive and for $1000 they definitely aren’t doing that. And I intuitively doubt that the outside of a lower fork clamp is the optimal spot for such tuning...
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anotherbikerguy
5 years ago
Here is a good rundown of the "word salad" on their website, their misrepresentation of science, their lack of (and apparent unwillingness to submit to) objective testing, and their lack of any patent for this supposedly revolutionary technology. If the sensors were cheaper and more people were buying them, Axxios would probably go the way of Power Balance. Maybe making them so expensive is an Emperor's New Clothes strategy... who's going to want to admit that their thousand-euro stickers aren't doing anything?
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jcook
5 years ago
No they make it quite clear that it’s purely an emotional support sticker for their athletes. Personally I would have made it into a gold star but I won’t fault them there...
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hamncheez2003
5 years ago
Thats not how science works. For something to be true, you have to provide evidence that it is true, not assume its true until someone disproves it.