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Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

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Old 02-27-06, 12:20 AM   #1
badger
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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.
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Old 02-27-06, 03:16 AM   #2
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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.
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Old 02-27-06, 06:47 AM   #3
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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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Old 02-27-06, 03:21 PM   #4
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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.
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Old 02-27-06, 06:01 PM   #5
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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

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Old 02-27-06, 09:22 PM   #6
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That's another reason, sure.

Explain to me what these v-brake things are again?
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Old 02-27-06, 10:02 PM   #7
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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.
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Old 02-27-06, 10:18 PM   #8
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They don't happen to dampen vibration by any chance do they?
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Old 02-27-06, 10:45 PM   #9
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I'll have to check with our marketing department and get back to you.
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