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  1. #1
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    Chainstay Survey (opinions wanted)

    I'd like to hear from Pros, Hobbyists, and dreamers, alike.

    Imagine chainstays with great tire clearance. They do everything you want them to do and they don't cause you grief during the build. Now...

    If those stays were 22.2, round, and tapered, would you use them?

    Most folks use oval stays for better tire clearance, and we're used to the aesthetic of those 26-30mm tall tubes. They make the chainstays look beefier, but their slim minor axis isn't the best for lateral stiffness. They're fine, but a tube that had a wider horizontal axis, like 22.2, would have slightly greater lateral stiffness.

    Would the slimmer look be a turn-off?

    Would available options be a downside? (TT has 2, Deda 2, nothing from Reynolds (ROR, only), Nova shows 3 options.)

    Do you rely on pre-bent stays? If you can't put a single bend in them, would you pass, opting for pre-bent oval stays?

    I'm trying to make a decision here that might benefit other builders. Any input you can give would be great.
    Last edited by D.F.L.; 12-18-2010 at 11:46 AM.

  2. #2
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    Well I am with you, I love round chainstays as I feel they are stiffer in the lateral plane.

    Hey man I will buy them but can you create a chainstay that will give the clearance that people want while not creating chainring clearance problems as well?

    If you can get around the design hurdles I am in.
    All the best,

    Dave Bohm
    Bohemian Bicycles
    http://www.bohemianbicycles.com
    &
    http://www.framebuildingschool.com

  3. #3
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    +1

    If there's some clever way to get good tire/ring clearance for the usual suspects/short chainstay bikes, count me in. Like Dave, I love to see new projects succeed and keep steel fresh and relevant.

    For what it's worth, bending round tubes is pretty easy for most serious amateurs and pros, so I'm imagining the stay could be straight to start out. I do like the taper at the dropout end for attaching things without giant hoods, though.

    Tell us more. If it makes any sense at all, I'll buy a box just on general principle.

    -Walt




    Quote Originally Posted by dbohemian
    Well I am with you, I love round chainstays as I feel they are stiffer in the lateral plane.

    Hey man I will buy them but can you create a chainstay that will give the clearance that people want while not creating chainring clearance problems as well?

    If you can get around the design hurdles I am in.
    Waltworks Custom Bicycles
    Park City, UT USA
    www.waltworks.com
    waltworks.blogspot.com

  4. #4
    Eric the Red
    Reputation: edoz's Avatar
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    I would try them out if I thought I could get the clearances I need without tons of manipulation on my part. If they worked I would use them more. I'm having a hard time wrapping my head around how you could get this from round chainstays though. Care to shed some light, or is this a project that you want to keep under wraps for now?

  5. #5
    Drinker w/ Riding Problem
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    Need a ...



    ?


    .

  6. #6
    Gabe.....
    Reputation: Smokebikes's Avatar
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    I'd be into that CS config. for big workable clearance......I suspect the design would not use a bridge and the tubes would not be brazed or welded directly to the BB.
    "Roll your own..........." http://smokebikes.com/

  7. #7
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    I've build a few frames with 22.2 chainstays. I like the look and I like how they ride even more.

    I'm currently building myself a new single speed with the TT 22.2, 9deg bend stays and without any dent I clear a 2.2 tire and a 34t ring wiht a 425mm chainstay length.
    Guillaume

    Cycles Golem

  8. #8
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    My Arete model has single bend ø22.2, albeit with long 29er stays at 450mm. It's unbelievable how they ride - if you think oval stays are 'stiff enough', build a frame with 22.2 stays and report back. They rool.

    For me, the perfect 29er stay is a double butted .8/.6 ø22.2 tube, with a single 16º bend. At the bend, some sort of really nice fluid dimple to get the cross-section down to 17-18mm or so (without increasing the vertical axis). A 150mm taper down to ø18 would mean shedding some weight by moving to the Paragon Mini Wrights.

    Unbent, you could use it for 'Cross.

    Bent 10º you could use it for 26ers.


    That's my Perfect Chainstay, for what it's worth.
    No longer member of the bike industry nor society, so don't hassle me.

  9. #9
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    I used 22.2 round on my SS cross bike, the dimpling put a slight bend into the stay which worked out well. Aside from being proportionally different than what I'm used to looking at, they ride killer and I will be using them again. If you are having a run made I would be up for some.
    Attached Thumbnails Attached Thumbnails Chainstay Survey (opinions wanted)-ss-stay-clearance.jpg  


  10. #10
    Plays with tools
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    You know what I would like to solve that problem is something like the Ahreans chain stay yoke in steel. Consistent clearance in all the tight spots that you don't have to worry about.

  11. #11
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    Dave Kirk uses stays similar to what Thylacine describes above. They're custom drawn by reynolds out of 631 - 22.2mm at the BB, taper down to 15mm at the DO. He gives a great explanation of the design in his Smoked Out thread on velocipedesalon.

  12. #12
    Belltown Brazer
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    I'm curious to see how the clearance issue will be solved with short-CS 29ers. I would love to use a round CS. I would even be open to use a one-sided yoke to allow round stays.

    As a hobbiest, I'd be good for a few sets/yr...not a huge amount.

    B

  13. #13
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    It's worth noting...

    That there are lots of 22.2 round/tapered chainstays already available.

    I assume there is something special about this new project, but if all you want is some 22.2 stays - every manufacturer makes them.

    -Walt

    Quote Originally Posted by cataño
    Dave Kirk uses stays similar to what Thylacine describes above. They're custom drawn by reynolds out of 631 - 22.2mm at the BB, taper down to 15mm at the DO. He gives a great explanation of the design in his Smoked Out thread on velocipedesalon.
    Waltworks Custom Bicycles
    Park City, UT USA
    www.waltworks.com
    waltworks.blogspot.com

  14. #14
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    I can't add any working experience as I've yet to build a frame yet but I can contribute some details from my custom hardtail.

    Chris Daily, maker of Smorgasbord Cycles (out of Hershey, PA), used Reynolds 853 tubing for the front triangle, round Reynolds 725 in his continuous yoked rear end, and finished with 4130 Breeze-in drop outs. The upper stay is the same diameter all the way around and the chain stays taper. I did run into a chain ring (48, 34, 22 tooth) clearance issue, I had to use a 132.5 bottom bracket, but that was more to do with my choice to run a Cook Brothers crank. I knew they tended to "snug" up tightly on the square taper, so it took a few tries to get the needed clearance.

    I uploaded a few pics, one is Chris making the loop stay for the yoked rear end, another is a shot of the rear of my SMOR for an idea of clearance (I can run a 2.4 WTB tire), and the last is a profile shot so you can see the rear end.

    -D-
    Attached Thumbnails Attached Thumbnails Chainstay Survey (opinions wanted)-dcp00273.jpg  

    Chainstay Survey (opinions wanted)-smorrear.jpg  

    Chainstay Survey (opinions wanted)-smorp1side.jpg  


  15. #15
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    Sounds like many agree that they are stiffer laterally. How's the vertical compliance?

  16. #16
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    Quote Originally Posted by Wish I Were Riding
    Sounds like many agree that they are stiffer laterally. How's the vertical compliance?
    on a classic diamond frame there is almost no vertical force on the CS,

  17. #17
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    Did you ever get any of these 22.2mm tapered stays made?
    Mark Farnsworth, Raleigh, NC
    http://farnsworthbikes.com

  18. #18
    Dinner for wolves
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    I'd love to see some modern examples of round CS 29ers, especially in the short CS flavor. Yes, I am a non frame building interloper.
    Responds to gravity

  19. #19
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    I may follow up on it, this year. I just wanted to see if folks had an aversion to the aesthetics of the round stay, which doesn't have the visual mass of oval stays.

    Quote Originally Posted by febikes View Post
    Did you ever get any of these 22.2mm tapered stays made?

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