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PYGA rear braking system


Simonpurdon

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Posted

Never! It's 26", and everyone knows 26" is dead!

 

but in all seriousness, there are pros and cons to each frame. the PYGA uses a shorter rocker which is better. Also the bottom mount of the rear shock floats. The Morewood is static. But as established, the brake position on the PYGA isn't ideal.

 

So moral of the story...

 

Just get the 2016 Devinci Troy! :lol:

 

DW Split Pivot Goodness. Low leverage rocker. shorter chainstays (thanks to Boost 148)... and it comes in plastic!

 

 

http://stwww.bikemag.com/wp-content/uploads/2015/08/2016-Devinci-Troy-SX-1.jpg

Bloody problem is we can't get them here and it will be donners expensive to bring it in.
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Posted

maybe I am to late, but then I am slow - but surely one should have enough skill so you should not be locking your rear brake ?

No. Not all trails are South Africa "steep".  Some are actually steep.

Posted

Never the less, anyone who takes technical discussions on Pink seriously needs to have their heads reads.

That site has got to have the most negative people in the universe.

 

 

Firstly if you braking so hard on a descent with your rear brakes that you can feel brake jack then you need to go back to skills training school.

 

 

maybe I am to late, but then I am slow - but surely one should have enough skill so you should not be locking your rear brake ?

 

watch Kirt Voreis from 1:15.

 

He seems to lock his rear wheel on descents. Guess he chould check the hub for the next skils clinic :ph34r:  :lol:

 

Posted

From a skillz video I saw many years ago... "Ride! Don't slide!"

Seems from this thread that advice is only applicable to PYGA riders...

 

for everyone else...

 

 

:ph34r:  :ph34r:  :ph34r: :ph34r:

:lol: :lol: :lol: 

 

Posted

No. Not all trails are South Africa "steep".  Some are actually steep.

 

Hehe...true this last weekend I was locking both wheels at the same time sometimes, luckily the corners were banked like big berms....

 

DOUBLE EDIT: and that's on a 26" Morewood Zula :whistling:

Posted

So is the hub decreeing that skidding is now allowed?

 

Not too long ago skidding was considered show boating and bad for the trail.

 

Has this now been reconsidered?

Posted

So is the hub decreeing that skidding is now allowed?

 

Not too long ago skidding was considered show boating and bad for the trail.

 

Has this now been reconsidered?

nothing says houding like a nice rooster....

 

I say skid ahead, in your pant, on the trail....when you leave the trail in your cab

Posted

Hey Guys, 

 

Just want to provide some insight into the whole braking discussion. Below are graphs created by the owner of Linkage, a linkage program used by the vast majority of bike designs, providing accurate information.  

 

"Anti-rise" is worked out as a percentage and relates to how much the suspension will or will not compress under braking. The higher the percentage of Anti-Rise, the stiffer and less responsive your suspension will be under braking. Leading to the feeling of 'Brake Jack' and more rear wheel chatter under braking. You will notice the conventional single pivot design (Sesta) has around a 90% anti-rise, and the horst link and VPP linkages are in the 60% range. Generally in a good design one will notice a lower percentage in downhill bikes due to extreme terrain conditions, accompanied by a much more progressive leverage curve. For XC and Trail bikes these parameters will change accordingly. 

 

On the PYGA braking system the brake pads will move up and down on the rotor by aprox 2-3mm. It is much easier for the pad to move up and down on the rotor, than the rotational force of the pads against the rotor. Therefore the up and down movement is not noticable (while riding). A static test will not give an accurate representation of how it reacts while riding, and will simply flex the rotor to the left. This does not happen when the wheel is rotating. Besides this, it will almost never occur that the brake is locked by the time the suspension is fully compressed. (In four years of using this design, PYGA have never experienced any shortcomings from this design, nor comebacks. Only compliments)   

 

PYGA Stage - Single Pivot - Starts at 54%, ending on 72%

 

post-15679-0-45446600-1441365221_thumb.png

 

Specialized Stumpjumper 2016 - Horst Link - starts at 62%, ends at 68%

 

post-15679-0-54401600-1441365790_thumb.png

 

Sesta - Single Pivot - Starts at 94%, ends at 86%

 

post-15679-0-47644800-1441365871_thumb.png

 

Below is an explanation from the Linkage programs designer, about his thoughts on the PYGA Stage. He has never seen the bike in flesh or hasn't ridden it, it is just how he has interpreted the data from the graphs. 

 

post-15679-0-74119400-1441365946_thumb.png

 

 

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