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Strange Seat Stay Welds

Old 05-14-20, 04:13 PM
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jc907
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Strange Seat Stay Welds

Hi Y'all,

I'm building on an unknown aluminum frame I purchased some 6 years ago and am curious about a couple of strange oblong scalloped additions welded to the left seat stay. There's 2 of them with one being closer to the seat tube junction while the other is about half way down the seat stay. Both are about 1" long and appear to be designed to secure a long, thin cylindrical item to the stay, but I can't think what that might be.

I apologize, but rules say I can't post pics until I have completed 10 posts.

Any ideas?
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Old 05-14-20, 04:37 PM
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You can post images now that you have ten posts.

Cheers
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Old 05-14-20, 04:38 PM
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Thank you
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Old 05-14-20, 05:15 PM
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Spoke Holders? https://framebuildersupply.com/colle...ers-2-10-packs
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Old 05-14-20, 05:42 PM
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Pics available now:


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Old 05-14-20, 05:45 PM
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Outer cable housing guides for a disc brake?

Cheers
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Old 05-14-20, 05:46 PM
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Originally Posted by dsbrantjr View Post

That could be it. The open slots underneath each attachment would be ideal for securing spokes with zip ties.
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Old 05-14-20, 05:48 PM
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Originally Posted by jc907 View Post
That could be it. The open slots underneath each attachment would be ideal for securing spokes with zip ties.
Exactly
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Old 05-14-20, 05:54 PM
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They're housing/hose guides. At the non drive side dropout, you can see where a disc brake could be installed on the frame. The guides allow you to run the housing from the last frame mounted stop, down the seatstay and to the braks. Spoke holders are usually found on the non driveside chainstay. Hope this helps.
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Old 05-14-20, 05:58 PM
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The boss mounts for the disc brake calipers is on the same stay as the mounts in question so that's also possible. Are hydraulic lines much thicker than cables?
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Old 05-14-20, 06:12 PM
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I've also noticed that the cable housing guides bosses on the top of the top tube have two guides for regular cables and one that is much bigger. In fact it's even too big for a normal cable housing. Therefore, it must be designed for something larger and the only thing I can imagine that would be is a hydraulic line. So, I guess your hose line theory is the winner Edward1066.

Thanks
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Old 05-14-20, 06:14 PM
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Those are disc brake hose/cable mounts.
They get these clipped over the hose.
https://www.amazon.com/Jagwire-C-Cli.../dp/B0029LIXCA


It allows for a single frame design for multiple models on various levels of components.
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Old 05-14-20, 06:20 PM
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...or zip ties if you lose the clips

Thanks

Well, it appears the mystery's been solved. Now, if I could just find out who built this darned frame...
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Old 05-14-20, 06:22 PM
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The holes on the bottom of the holders allow for a small zip tie to hold them in place. Prevents any kinking of the cables or hoses. HTH, MH
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Old 05-14-20, 10:14 PM
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Welds look good to me.
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Old 05-14-20, 10:28 PM
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Originally Posted by jc907 View Post
I've also noticed that the cable housing guides bosses on the top of the top tube have two guides for regular cables and one that is much bigger. In fact it's even too big for a normal cable housing. Therefore, it must be designed for something larger and the only thing I can imagine that would be is a hydraulic line. So, I guess your hose line theory is the winner Edward1066.

Thanks
Yes, the cable “stop” is oversized for hydraulic hose to pass through. Since hydraulic systems need liquid filled tube from the lever to the caliper, the stops are larger and don’t have a “stop” on them like cables do. If you have a mechanical system that does use cable and you don’t want to run cable from the lever to the caliper, you can get stops that fit into the fittings that are welded onto your bike. Jagwire CHA056 are what you would need.

This is what the fitting on the chainstay looks like with a mechanical disc

Untitled by Stuart Black, on Flickr
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Old 05-14-20, 11:01 PM
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Originally Posted by cyccommute View Post
Yes, the cable “stop” is oversized for hydraulic hose to pass through. Since hydraulic systems need liquid filled tube from the lever to the caliper, the stops are larger and don’t have a “stop” on them like cables do. If you have a mechanical system that does use cable and you don’t want to run cable from the lever to the caliper, you can get stops that fit into the fittings that are welded onto your bike. Jagwire CHA056 are what you would need.

This is what the fitting on the chainstay looks like with a mechanical disc

Untitled by Stuart Black, on Flickr
Good info. Thank you!
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