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What about this drilled tooth chainring?

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What about this drilled tooth chainring?

Old 01-21-21, 02:05 PM
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Velikus
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What about this drilled tooth chainring?

Looking for a bit of info on this chainring. It came to me on a 1976 Record Strada crank and , while I'm pretty sure it's home drilled, I'm not sure about those teeth. Hopefully some of you guys who know more than me can clue me in. Is this a Campy chainring? That haphazard 52 has me doubtful. Any idea what it is? And would you ride it? Thanks!



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Old 01-21-21, 02:22 PM
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juvela
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not Campag

their dentition marking differs

perchance another reader shall recognise it straightaway...

could we have an image of the back side to assist readers?

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Old 01-21-21, 02:26 PM
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repechage
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I would break it.
Coffee Run bike fitment.
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Old 01-21-21, 02:26 PM
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My Google fu is strong today. Gian Robert, they made lower quality copies of Campagnolo parts.

https://www.ebay.com/itm/GIAN-ROBERT...cAAOSwfX9b6q-~
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Old 01-21-21, 02:33 PM
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juvela
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Originally Posted by brian3069 View Post
My Google fu is strong today. Gian Robert, they made lower quality copies of Campagnolo parts.

https://www.ebay.com/itm/GIAN-ROBERT...cAAOSwfX9b6q-~
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fine work!

and alacritous as well


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Old 01-21-21, 03:04 PM
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Wow, that was fast, thanks guys! So this is a Gian Robert chainring that's been further drilled out and should probably be carefully ridden. Good to know. Check this out:

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Old 01-21-21, 03:35 PM
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I don't think there is any reason to be concerned. There isn't any structural deficiency that I can see. that measurement is nearly meaningless. The holes don't impact anything either.
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Old 01-21-21, 04:19 PM
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Ride it.
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Old 01-21-21, 07:23 PM
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I'd hang it on the wall, because if I rode it I'd ride it to death and that would be a shame for something so quirkily cool.
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Old 01-22-21, 04:44 AM
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The sprocket is factory drilled (I think) and I have seen them before. Sadly, I cannot remember what bike(s) I have seen them on.

Other that some worn teeth, the sprocket is just fine and I would not hesitate to use it, from a mechanical stand point. Cosmetically - nope. I am not a fan of Drillium.
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Old 01-22-21, 01:33 PM
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Originally Posted by randyjawa View Post
Cosmetically - nope. I am not a fan of Drillium.
Bet this hurts your eyes, then:


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