I’m thinking of using it on a new chain – the teeth have shark toothed a bit though??

run it ‘the other way’ round and see how you get on. I’d use it.

looks ok. but as above flip it round.

That looks barely used. I would run it the regular way round for this chain. Maybe reverse for the next chain if the wear is more noticeable.

Here’s another shot

Alternatively, try it with a new chain. If it skips, which you’ll find out in the first 10secs, flip it. Just a thought, and, tbh, I’ve never been able to properly judge whether things will mesh or not unless it’s properly on it’s way to being dead.

Oh, ok – looks a little worse. Flip it.

So as long as it rides OK and doesn’t slip, it’s OK?

Yes.

Looks mint compared to a lot I run on mine!!

Are you running a tensioner or horizontal dropouts/ebb? If either of the latter you can get away with almost no teeth…..

Oooh, EBB 🙂

That’s not even bedded in, I’d consider this to be well worn[url=https://flic.kr/p/qAagnM]worn freewheel[/url] by D0NK, on Flickr
(not a great pic of the teeth I know)

depends how shonky you are happy to live with, the above still worked-ish steep climbs could be a rather skippy tho. Even so looks loads of life left on yours before it starts to jump at all, may be a bit of noise from the burrs on the teeth which I guess you could file down. If you’re a perfectionist flip it and fit a new chain.

Good God. That puts things into perspective

🙂

I’ve only had a cog slip when it’s properly reached “end of life”. I remember picking a non-hilly route home was tricky 😉

[url=https://flic.kr/p/8dHQjL]King Kog end of (short) life[/url] by Jonathan Bateman, on Flickr

That Niner cog is barely run in 🙂

D0NK’s and my photos illustrate well that an alu cog will fail, whilst a steel cog (particularly a freewheel) will often just keep on wearing until time has eroded it away 🙂

Jon – that’s interesting – (alu cogs failing etc)

So Donk’s is a steel one?

Your cog’s teeth look similar to mine (the ones still left)

It was a sad day when this Steel Surly finally passed away…

So Donk’s is a steel one?

yep, oh is your’s Ali? In that case it looks dangerously worn, bin it and fit a steel one 😉

in all honesty I have no idea how well ali ones wear but presumably they need a slightly better maintenance/replacement regime than mine.

Bloodie eck donk – slightly 😆

SS and especially SS commuters (as that one ^ was) don’t get much TLC in my house.

Your cog’s teeth look similar to mine (the ones still left)

That’s a Chris King one – very light and not very thick. Interestingly it doesn’t look like they do them in alu any more. That one had been worn a lot more than yours, then flipped and worn quite a bit the other way before it gave up. Most of my other singlespeed bits are steel and thick – which last for ages (relatively).

And I like verses proof that I’m wrong about steel cogs not failing 🙂