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I thought the point of NW was so the chainring didn't throw the chain so easily.
What's the point of having it on jockey wheels which are surrounded by a cage?
I don't know. The Shimano pulleys don't have narrow/wide profiling, that I can see:
And the SRAM 12/14T pulleys from Kogel (which matches what the mech ships with) have a narrow/wide profile on the lower pulley, so I'm assuming that the reason they specified the 14/14T set was that they didn't have it.
But @TotalShanner had no issues with his Shimano HG+ chain on the lower pulley wheel, so who knows?
Dammit-
Well you've opened and fitted the pulleys so does that mean you can't send them back now anyway?
Give it a try with the sram pulleys first. I'd be interested to see if you get on OK. I can send you a video of what mine look like while pedaling if you want. Really no issues.
The comments in that article are the only ones I've really seen saying they had issues with the pulleys. But there's not really a great deal of info out there on what is obviously a niche set up.
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This has made me think about what could potentially be causing the problems for the folk commenting in that article.
I have no issues with the chain meshing with the lower NW jockey.
But it might be possible that those with issues inadvertently done something wrong when feeding the chain through the derailleur.
The chain might have been feed through the NW jockey and ending up sitting on the wrong tooth and being out of sync. The same way folk had the issue on the top jockey wheel on 11 speed.
The fix for them might be as simple as braking the chain and moving it up and over one tooth on the cassette and jockey wheels. Thus putting it into sync.
Does that make sense?
TotalShanner
I thought the point of NW was so the chainring didn't throw the chain so easily.
What's the point of having it on jockey wheels which are surrounded by a cage?