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  1. #1
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    Paging John P...575 flex point question.

    Could you take a moment to explain the lack of a carbon flex point on the new '12 575's? The flex point has been a mainstay of the 575 since it's inception and I am curious as to the engineering thought as to why it's absent (from what I can tell) from the new frame.

    Thanks in advance.

  2. #2
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    Yes, was wandering myself. What happend to the flex pivot...
    Is there a stress now on the triangle weld or it is not exactly the same as it used to be?

  3. #3
    Lucky...
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    Shop told me the flex occurs in the chain stay itself.

  4. #4
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    Quote Originally Posted by Mr Bacon Jr View Post
    Shop told me the flex occurs in the chain stay itself.
    That was my understanding of this too from everything I have seen and read.
    2012 Yeti 575 Race
    2013 Niner AIR 9

  5. #5
    mns
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    must be similar to the asr5.

  6. #6
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    My guess would be that the cost to performance ratio with the carbon wasn't penciling out...

  7. #7
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    Quote Originally Posted by obrianmcc View Post
    My guess would be that the cost to performance ratio with the carbon wasn't penciling out...
    Always possible, but after 8 years??

  8. #8
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    Quote Originally Posted by mns View Post
    must be similar to the asr5.

    This is true, but carbon flexes nearly forever whereas aluminum won't. Aluminum actually weakens with fatigue.

    But, with that said, my guess is that it flexes so very little during suspension compression, the aluminum will be just fine for thousands and thousands of miles.
    Last edited by bpnic; 02-17-2012 at 07:39 PM.
    I'd hit it, but I bruise like a peach.

  9. #9
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    deleted in favor of new thread
    Last edited by eatdrinkride; 02-17-2012 at 11:01 PM.

  10. #10
    Boise
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    Quote Originally Posted by eatdrinkride View Post
    Always possible, but after 8 years??
    Yep....If my understanding is correct... the 575 frame is comprised of imported components and assembled here in the US? Costs have been rapidly increasing overseas on average 10-20% a yr depending on your industry. It really creates a situation whereas the Mfg'r has to absorb the increased cost or figure out how to lower cost out of the spec to offset...it really insn't ideal as it forces the sales team to present a price increase to the dealer without any real upgrade to the product.

  11. #11
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    Paging lol..... What are we in 1993 !!

  12. #12
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    Quote Originally Posted by moneycash View Post
    Paging lol..... What are we in 1993 !!

    Amazingly many words in the English language have more than one meaning. Here, let me help.

    verb (used with object)
    5.to summon formally by calling out the name of repeatedly:

    "He had his father paged in the hotel lobby."

  13. #13
    funbiker
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    Afaik the reason to change the triangle from carbon to aluminium was the price.
    They wanted to offer a cheaper bike for those who don´t need/want an SB66.

  14. #14
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    Quote Originally Posted by eatdrinkride View Post
    Could you take a moment to explain the lack of a carbon flex point on the new '12 575's? The flex point has been a mainstay of the 575 since it's inception and I am curious as to the engineering thought as to why it's absent (from what I can tell) from the new frame.

    Thanks in advance.
    There is still flex in the rear swingarm. The flex is built into the length of the aluminum seat stay. The flex is never more than a 2 degree difference and that coupled with the dogbone allows us to control the leverage ratio going into the rear shock.

    It has been tested extensively (we actually realized we could do this several years ago but waited until we could make it look "right" with the frame).

    See you on the trail!
    Takin' a knowwhatI'm census...

  15. #15
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    Quote Originally Posted by roverhockey View Post
    There is still flex in the rear swingarm. The flex is built into the length of the aluminum seat stay. The flex is never more than a 2 degree difference and that coupled with the dogbone allows us to control the leverage ratio going into the rear shock.

    It has been tested extensively (we actually realized we could do this several years ago but waited until we could make it look "right" with the frame).

    See you on the trail!
    Thanks for responding.

  16. #16
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    Quote Originally Posted by roverhockey View Post
    There is still flex in the rear swingarm. The flex is built into the length of the aluminum seat stay. The flex is never more than a 2 degree difference and that coupled with the dogbone allows us to control the leverage ratio going into the rear shock.

    It has been tested extensively (we actually realized we could do this several years ago but waited until we could make it look "right" with the frame).

    See you on the trail!
    where's jp been?
    Last edited by bpnic; 03-01-2012 at 08:34 PM.
    I'd hit it, but I bruise like a peach.

  17. #17
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    Quote Originally Posted by bpnic View Post
    seth- where's jp been?
    who is JP? I ran into a Yeti rider once out at SoMo in PHX that had Big Jim tatoo'd on his frame. He noticed my cable ran under my BB and gave me some advice before we parted ways....JP=Big Jim?

  18. #18
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    Quote Originally Posted by roverhockey View Post
    There is still flex in the rear swingarm. The flex is built into the length of the aluminum seat stay. The flex is never more than a 2 degree difference and that coupled with the dogbone allows us to control the leverage ratio going into the rear shock.
    I might be dense here, but what does that even mean? What does a small amount of vertical compliance (chainstay and seatstay flex) have to do with the leverage ratio of the linkage?

  19. #19
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    Quote Originally Posted by eatdrinkride View Post
    who is JP? I ran into a Yeti rider once out at SoMo in PHX that had Big Jim tatoo'd on his frame. He noticed my cable ran under my BB and gave me some advice before we parted ways....JP=Big Jim?
    John P. / John Pentecost of Yeti

    The New Guy Blog – Episode #1 – The Interview | Think Turquoise
    Last edited by bpnic; 03-01-2012 at 08:35 PM.
    I'd hit it, but I bruise like a peach.

  20. #20
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    Quote Originally Posted by bpnic View Post
    seth- where's jp been?

    I spoke with him Last Friday and he was going on Vac for 10 days starting tomorrow, So I hope he enjoys his time off before they crazy season starts
    My new Quote is "don't let friends ride old bikes on DH Trails "

  21. #21
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    Quote Originally Posted by YETI_Chris View Post
    I spoke with him Last Friday and he was going on Vac for 10 days starting tomorrow, So I hope he enjoys his time off before they crazy season starts
    Cool, thx. Hope he enjoys it!
    I'd hit it, but I bruise like a peach.

  22. #22
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    Quote Originally Posted by nybike1971 View Post
    I might be dense here, but what does that even mean? What does a small amount of vertical compliance (chainstay and seatstay flex) have to do with the leverage ratio of the linkage?
    I'm no expert on the design but from my understanding they have always used the carbon flex point in lieu of a bearing. The idea being that an actual bearing at the rear chainstay only would rotate a very small degree. That being said the needed flex back there was accomplished by the built in flex point...and now seems to be unnecessary in reality. The bearing might have been a patent infringement issue as well, I don't really know. Depends on where it would be relative to the dropout I suppose.

    Doesn't really answer your question but maybe we'll get a better answer from those who now best.

  23. #23
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    I am sure Yeti knows what they are doing here, but the "new" approach would've make me nervous bottoming out the 575?, or even using full travel intesively. Again it's just my stomach..........?

  24. #24
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    Quote Originally Posted by bpnic View Post
    where's jp been?
    I think his pager is in storage along with his bag phone....
    Takin' a knowwhatI'm census...

  25. #25
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    Our Very Own John P from Yeti here in Colorado down Under in NZ !!!

    Nice Place for Yeti to send someone on Vac Hope he had a Blast !!

    John Pentecost rides Queenstown from Black Seal on Vimeo.

    My new Quote is "don't let friends ride old bikes on DH Trails "

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