Rohloff drivetrain wear: when to replace chain, sprocket, chainring?

[Chris2020]

Hello, 
I’m a 1st time Rohloff owner. Thorn nomad mk3
5 years old  22000km

Minimal maintenance other than yearly oil change and very occasional cleaning and oiling. No chainglider
EBB at max adjustments. Ie.
chain at the pont when I would need remove links.
I am wondering when would be the point to either replace the chain,  replace or flip the chainring and/or sprocket?
Any advice would be much appreciated.
Thanks
Chris

[UKTony]

I take it from what you say that the slack in the chain has already reached the point where adjustment is necessary but there’s no adjustment remaining on the eccentric.

Rohloff recommend a new chain is fitted after reversing a sprocket.

I don’t know how successful taking a link out of the chain would be because I’ve never done it. If it was me I’d simply flip the sprocket, and the chainring, then fit a new chain.

[JohnR]

I think that with a straight chainline then the chain can be fairly slack without the risk of it coming off. However, if it's a long time since the chain was last replaced then I would first replace the chain (single speed chains are reasonably priced) and see how will it runs. If it isn't happy then flip the sprocket and chainring.

[Chris2020]

I take it from what you say that the slack in the chain has already reached the point where adjustment is necessary but there’s no adjustment remaining on the eccentric.

Yes, and it's come off a couple of times now. The chain has never been replaced. I did buy a replacement at some point but haven't swapped it yet, but from what I understand now would be the time to do so.

[PH]

You might eek out another few thousand km's by taking a link out, but the failure method becomes more and more likely to be a snapped chain.  I'd consider I'd had good value from it. flip both chainring and sprocket and fit the new chain.    I don't always get the same distance out of the second side of a chainring and sprockets, maybe 70%, but yours don't look as worn mine usually do at that mileage.  Even at 70% that's nearly 40k km from a chainring, sprocket and two chains, that'll turn most people running a derailleur green with envy.