"You can tell a Finn but you can't tell him much" (youcantellafinn)
08/11/2015 at 10:55 • Filed to: F1, Penske, mtb, mountain biking
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"You can tell a Finn but you can't tell him much" (youcantellafinn)
08/11/2015 at 10:55 • Filed to: F1, Penske, mtb, mountain biking | 2
| 7 |
Trek bicycles partnered with Penske Racing and Fox Shocks to develop !!!error: Indecipherable SUB-paragraph formatting!!! . Pretty cool stuff going on here. Science FTW!
I may have to check out the bike swap next spring. Turns out that my !!!error: Indecipherable SUB-paragraph formatting!!! might be morphing. From the digging I’ve done I may be SOL when it comes to swapping to a 1x11 or even 2x10 setup on my bike. Turns out parts availability on 10 year old bikes starts getting limited. It doesn’t look like there is a driver available for my vintage Mavic Crossmax wheelset that would allow me to put on a 10 or 11 speed cassette.
On the other hand we rode a different set of trails Saturday and I didn’t run into my weird gearing gap that plagues me on a lot of rides. Turns out the place I usually ride might just have nasty climbs.
SidewaysOnDirt still misses Bowie
> You can tell a Finn but you can't tell him much
08/11/2015 at 11:05 |
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Holy shit! Their damper
reacts?
Mind blown. They’re really onto something here.
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SidewaysOnDirt still misses Bowie
> You can tell a Finn but you can't tell him much
08/11/2015 at 11:12 |
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The regressive valve was born here. It’s meant to provide support, but open up very rapidly when needed
Gah! I hate it when simple features are explained in markettingspeak. It has a fast-bump setting. That’s all. This is nothing revolutionary, new, or even F1 inspired. It’s been around forever.
OPPOsaurus WRX
> You can tell a Finn but you can't tell him much
08/11/2015 at 11:13 |
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that sounds pretty sick.
Mattbob
> You can tell a Finn but you can't tell him much
08/11/2015 at 11:34 |
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sigh, and I’ve just been looking at shocks that I can’t afford. My Float R needs a rebuild but I am debating getting a different shock instead of a rebuild ... decisions decisions... also lack of funds.
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You can tell a Finn but you can't tell him much
> SidewaysOnDirt still misses Bowie
08/12/2015 at 14:58 |
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Well, Penske does have a patent application that would appear to show they are responsible for inventing an “inerting damper with regressive characteristics”. There is a little more reading available here, and it comes complete with part diagrams and damping curves if you’re interested. https://encrypted.google.com/patents/US2014…
If you do a little googling for the term regressive damping Penske comes up with pretty much every result.
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SidewaysOnDirt still misses Bowie
> You can tell a Finn but you can't tell him much
08/12/2015 at 15:35 |
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...and here’s the bit that makes me not understand how this is patentable or new. It has a second canister with different valving so that once a certain pressure is reached, oil flows into that cannister to allow the damper to compress faster. Seems pretty standard. They might be using a different spring mechanism or something, but this has been around for decades.
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You can tell a Finn but you can't tell him much
> SidewaysOnDirt still misses Bowie
08/12/2015 at 16:01 |
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They are running this in shocks without piggyback reservoirs too. The details that make this patentable seem to be happening in this valve and its behavior. From what I can gather this is just a different way to provide speed sensitive damping and the mechanism is what is patentable, not the idea of speed sensitive damping.
From what I gather at low shaft speeds the fluid is forced through the small holes and the pressure only acts on a small area. Once shaft speed hits a certain threshold the valve opens rapidly allowing a lot of fluid through. If the shaft is moving fast enough to fully open this valve then a standard shim stack takes over the damping.
My first thought was that this was just a cleaner way to implement something along the lines of the Specialized Brain shock, but it appears to be quite different in its operation and behavior. The Brain had the shock either open or locked out, but this almost seems to give continuously variable damping between locked and full open, and damping seems to only depend on shaft speed.
Unlike other systems this doesn’t care where the shock is in its travel. It isn’t locked out near the top of its travel, then wide open through the middle and then ramping up at the end of travel to keep you from bottoming out. It seems to be locked out at low shaft speeds, wide open at moderate shaft speeds and then ramps up at high shaft speeds. I’m sure I’m missing some details here, but that is what my quick read of the information available seems to indicate.