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Purchased a new Arkose 3 yesterday, should have checked everything in the shop but being the fool I am I was just eager to cycle off on my new shiny bike, but when I got home I noticed the chainring looks damaged/worn.
I'm no bike expert (first bike in 15 years) but this isn't normal is it? It's like that the whole way round.
[url= http://imgur.com/nMRJJx8 ]Photo[/url]
Post a photo up.
I'm betting it's teeth profile to help shifting.
Sorry, photo didn't work. Link now added.
Looks like it's just how FSA do the varying tooth profiles, all looks pretty random
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Glad its not faulty. What's the purpose behind doing that?
Shifting "gates". Gaps to help the chain release and move to other ring easier.
SCIENCE! I think the idea is that the tall teeth lift the chain, and the lower teeth make it easier to lift it on and off the ring- since a tooth can only lift as high as itsself. Makes for smoother shifting
It's quite interesting, I think- different companies have different ideas about what works best and different manufacturing methods give different shapes too.
And different patents 🙂
Hah. Yes.
Thanks guys, that's really helpful and quite interesting.
Those things that lots of us were taught NOT to do, are doable on new modern drivetrains. Shifting under high load for example.
I remember getting my Ridgeback 601LX back from the shop and going "Oh, these chainrings are not round - what's going on!"
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