The Street > The Bike Shop
Keychain woes?
badlight:
My keychain did the same thing on a brand new deluxe sprocket. I just kept riding it, it's fine. My sprocket looks a lot less worn than yours though, but I may also just be crazy.
montymitch:
--- Quote from: G on April 28, 2015, 05:25:12 PM ---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.
--- End quote ---
The only reason I noticed this in the first place was that I was having a difficult time getting chain tension dialed in. I'm a seasoned rider, I've worked in bike shops, and I've built and maintained my own rides for decades. If I back off the chain tension, I get slap on the chainstay. If the chain is taught, I get the weirdness seen in the video. It's definitely a little notchy feeling when I ride it.
In my experience, the first few teeth should be tight under load, and then slack on the sprocket after that. The thing that is odd about this is that it's tight where the chain comes off of the sprocket and loose in the middle. I imagine the chain will fit a little better after it has stretched a little, but I'm worried that in the mean time it will ravage my sprocket, driver, or both.
streetStreet:
Do you use tensioner's?
montymitch:
--- Quote from: streetStreet on April 28, 2015, 08:16:04 PM ---Do you use tensioner's?
--- End quote ---
Yep. It's a Sunday 2nd Wave with the built in tensioners. I've never encountered this problem.
weedbix:
--- Quote from: Louis on April 28, 2015, 04:56:21 PM ---Chain line? what? How could that have anything to do with it? lol maybe im missing something.
Chain line mathematically? :D
--- End quote ---
1. Misalignment + tension
2. Yep. Can't trust eyes (unless you are iamhollywood)
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