why do they make frames like this ?- Mtbr.com
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  1. #1
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    why do they make frames like this ?

    the bent chainstay. why isnt it like the other side? is it so the chain doesnt hit the frame as much or what ?


  2. #2
    since 4/10/2009
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    chain slap

  3. #3
    Cycologist
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    Can't see much in your photo but a lot are dented in for chainring clearance.
    By continuing to browse my posts, you agree to send me cookies.

  4. #4
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    I have a third answer
    It enables wider tires.

  5. #5
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    It's so they can have a short chainstay on a bike with big fat tires. You might notice that if it were higher, there is very little room between the chainring and tire.

    Other strategies are (for metal bikes) having that junction machined as one piece so it can be thinner, then welding it to a tube after it clears the chain ring. Or, putting the ds stay above the chainring like the Trek Stache.

    The Super Boost 157 strategy is to push the cassette out, so then the chainring can be pushed out and give more clearance for the stay.

  6. #6
    Nat
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    Chainring clearance.

    And for general sass.

  7. #7
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    Yep. No room between the tire and the chainring for the chain stay. The other option is a high chainstay, like on the Trek Stache.
    Do the math.

  8. #8
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    +1 for Chain Slap
    "And crawling on the planet's face, some insects called, The Human Race..."

  9. #9
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    Conversation starter.

  10. #10
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    Here is a better picture showing how it is bent downward:


  11. #11
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    Quote Originally Posted by chuckha62 View Post
    +1 for Chain Slap
    Sad, the owners will be missing out on such pleasant sounds.
    Quote Originally Posted by mileslong View Post
    I passionately remove rocks and corners and other stuff I find too hard to ride.

  12. #12
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    Quote Originally Posted by BlueCheesehead View Post
    Here is a better picture showing how it is bent downward:

    4th answer: Makes for a more rigid frame in terms of torsion.
    Quote Originally Posted by mileslong View Post
    I passionately remove rocks and corners and other stuff I find too hard to ride.

  13. #13
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    Quote Originally Posted by DIRTJUNKIE View Post
    Sad, the owners will be missing out on such pleasant sounds.
    Ring, Ring! Hello?
    "And crawling on the planet's face, some insects called, The Human Race..."

  14. #14
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    Quote Originally Posted by chuckha62 View Post
    Ring, Ring! Hello?
    Im here, how can I help you?

    Ahh..you are for chain slap, missed that.
    Quote Originally Posted by mileslong View Post
    I passionately remove rocks and corners and other stuff I find too hard to ride.

  15. #15
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    Quote Originally Posted by Schulze View Post
    It's so they can have a short chainstay on a bike with big fat tires. You might notice that if it were higher, there is very little room between the chainring and tire.

    Other strategies are (for metal bikes) having that junction machined as one piece so it can be thinner, then welding it to a tube after it clears the chain ring.
    Marin Pine mountain is an example of this.

    Sent from my Moto G (5) Plus using Tapatalk

  16. #16
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    Quote Originally Posted by DIRTJUNKIE View Post
    4th answer: Makes for a more rigid frame in terms of torsion.
    Why would it do that? If that were the goal wouldn't they do it to NDS too?

    Sent from my Moto G (5) Plus using Tapatalk

  17. #17
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    this allows room for a big tire, a chainring, and short chainstays. Salsa solved the problem thusly
    why do they make frames like this ?-woodsmoke_xo1_eagle_red-1.jpg

    Trek Stache
    why do they make frames like this ?-p5pb12117321.jpg

    Specialized
    why do they make frames like this ?-spesh-fuse-comp-1479812471526-avtswmdf1kd0-8ebbf07.jpg

  18. #18
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    Quote Originally Posted by mack_turtle View Post
    this allows room for a big tire, a chainring, and short chainstays. Salsa solved the problem thusly
    Click image for larger version. 

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    Trek Stache
    Click image for larger version. 

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    Specialized
    Click image for larger version. 

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    But Salsa is not the originator of the elevated chainstay design. I remember seeing those on Nishiki's back in the 90's

    https://forums.mtbr.com/vintage-retr...ns-590280.html

  19. #19
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    Quote Originally Posted by Truckee29 View Post
    But Salsa is not the originator of the elevated chainstay design. I remember seeing those on Nishiki's back in the 90's

    https://forums.mtbr.com/vintage-retr...ns-590280.html
    nobody said salsa was the originator. Yeti was doing them in the 80s too, as was brave. Kinda lame solution, imo.
    "Things that are complex are not useful, Things that are useful are simple."
    Mikhail Kalashnikov

  20. #20
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    Quote Originally Posted by scottzg View Post
    nobody said salsa was the originator...
    Thanks. I'm aware of that.

    Back to OP question: That chainstay form is to provide chainring clearance. That's all

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