Originally Posted by
Winfried
I agree, although
in this article, the user complained of malfunction after applying too much grease (just on the rollers? Also the gears?).
Still, am I correct in understanding that the rollers are indeed how the force goes from the cog to the ground through the gears and the hub?
I'm surprised it all works simply by having the rollers push against the walls of the hub.
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Edit: It appears that the Nexus 7 has no roller clutches, and relies on two sets of pawls to rotate the hub:
Roller clutches are sensitive to the film strength of the lubricant which is the reason Shimano formulates their own semi fluid grease. When someone experiences these issues, I suspect it is because they use a more viscous grease which will hinder the engagement and traction of the rollers.
If you use either Shimano Nexus grease, or oil, you should experience no such issues.