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  1. #1
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    Seatstays. Straight vs. S bend

    I am working with a builder now who recomended s bend seatstays over straight to to improved ride quality. He feels the bent seatstays help dampen vibration. (The frame is a 29" wheeled mountain )Any thoughts on this? Thanks.

  2. #2
    Industry Maven Thylacine's Avatar
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    I'd be keen to find out how two essentially the same stays made out of the same material can have noticibly different 'vibration damping' characteristics. I can't see how they possibly could.
    Have you earned your stripes? <<click here / Questions about custom frames? Chat me! - warwickg71 (AIM/iChat) ThylacineCycles (Skype)

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    Quote Originally Posted by Thylacine
    I'd be keen to find out how two essentially the same stays made out of the same material can have noticibly different 'vibration damping' characteristics. I can't see how they possibly could.

    wow -
    mark this date on the calendar.
    i agree with warwicko!

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    Industry Maven Thylacine's Avatar
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    So he's not buying this frame off you then?

    I've had two very very similar bikes - one with s-bend and one with single bend - and I think I actually prefer single bend. I'm big enough to say I don't know why....I think they might have more predictable or linear flex/resonance characteristics, but I'm not a Physicist or Metalurgist so don't quote my seat-of-the-pants report.

    Still, probably the biggest reason to use s-bend chainstays is heel clearance if you're a 'heel-in' kinda guy, but honestly, I don't think it really matters which one you choose. If the guy had said "Coz they look cool and that's what Columbus is selling" I'd go "right on", but....vibration damping? I don't think so. You want vibration damping? Get a full suspension bike or take 2psi out of your tires. Both would result in more 'vibration damping' than s-bend seat stays IMHO.
    Have you earned your stripes? <<click here / Questions about custom frames? Chat me! - warwickg71 (AIM/iChat) ThylacineCycles (Skype)

  5. #5
    Older I get, Better I was velonomad's Avatar
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    Quote Originally Posted by badger
    I am working with a builder now who recomended s bend seatstays over straight to to improved ride quality. He feels the bent seatstays help dampen vibration. (The frame is a 29" wheeled mountain )Any thoughts on this? Thanks.
    I always thought the reason to use S bent seat stays is to get the cantilever/v-brake bosses closer together so that V-brake pads hit the rim near the top of the brake arm's arc instead of arcing down when used on MTB's with a lot of tire clearance between the seatstays and/or narrow rims. I bought a pair last year for one of my mtb's that I made the seatstay clearance too wide for the brakes to work properly. It is gonna take a much bigger a$$ than mine to get them to flex enough to absorb any vibration


  6. #6
    Industry Maven Thylacine's Avatar
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    That's another reason, sure.

    Explain to me what these v-brake things are again?
    Have you earned your stripes? <<click here / Questions about custom frames? Chat me! - warwickg71 (AIM/iChat) ThylacineCycles (Skype)

  7. #7
    Older I get, Better I was velonomad's Avatar
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    Quote Originally Posted by Thylacine
    Explain to me what these v-brake things are again?
    They is them aluminum thingy's that you adjust everyday to scrap the mud and aluminum off of your rims.

  8. #8
    Industry Maven Thylacine's Avatar
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    They don't happen to dampen vibration by any chance do they?
    Have you earned your stripes? <<click here / Questions about custom frames? Chat me! - warwickg71 (AIM/iChat) ThylacineCycles (Skype)

  9. #9
    Older I get, Better I was velonomad's Avatar
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    I'll have to check with our marketing department and get back to you.

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