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Keychain woes?

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master:

--- Quote from: montymitch on April 26, 2015, 10:18:09 PM ---Here's a little video. My chain line is damn near perfect, and you can see the sprocket is already starting to show some wear.
https://youtu.be/vWMZgqhIdSw

--- End quote ---

So that looks like at least 2-3mm of play... I'd email G and show him the video to get his input. Part of me says to ride it a bit to break it in if you haven't already.

JFax:
Cold it really be the chain? Sounds like a slightly oval sprocket. Seems unlekely, but I would get a ruler or a compass out to check its roundness just to be sure.

weedbix:
Keychain is going to be less tolerant of sprocky/driver misalignment. Have you worked out your chainline mathematically? Not always easy unless you know the distance from the driver teeth to dropout. I dunno what that dimension is on a Antigram but on a Ratchet it's 11.5mm so it _could_ be the same

Louis:
Is this thread real?

Suggesting Shadow chains over Odyssey?
Chain line? what? How could that have anything to do with it? lol maybe im missing something.
Chain line mathematically? :D

Haha, anyway (after watching your vid) I've noticed this same phenomena before on my BMX with a Drop Buster chain (z510hx). I wouldn't worry too much about it... but thats just me.

If it was a more perfect fit I think we would get more adverse issues.

G:
Is your chain very tight? The aim of a chain (or the threads on a bolt/nut) is to transfer the load from the sprocket to the chain (or the bolt to the nut). You can never expect the components to fit so perfectly that they all take an equal share of the load, so the last tooth will take most, and then the next one a bit less (or the first thread for a bolt/nut). Typically, it is just the first 3 teeth (or threads) that take 80% of the load or more, and the further you move from the load the less it is. So you would expect to always see something like you have there... having said that, it is obviously hard to tell from a video compared to having it in your own hands, but it does look like maybe that is a bit extreme for all brand new parts.

How does it ride? If it seems OK to ride, then please check that the chain tension isnt excessive and try riding it and see if it seems to improve or worsen.

I hope this makes sense and seems reasonable.

:)
G.

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