it's the last piece of the puzzle isn't it... it does spin very freely though?
i wonder whether the inertia of the slightly larger 34t cassette also has a role though. when you stop pedaling the cassette continues for a bit and causes the chain slap
Spins freely but have the tiniest bit of drag. I've done a few hope hubs services, put the rubber seal wrong = chain slap. It's the same with most brands.
If you're super lazy chug a bit of WD40 behind the cassette where the seal is, see how much better it gets (not a long term solution)
it's the last piece of the puzzle isn't it... it does spin very freely though?
i wonder whether the inertia of the slightly larger 34t cassette also has a role though. when you stop pedaling the cassette continues for a bit and causes the chain slap