Join Date: Oct 2013
Location: Chilliwack, BC, Canada
It's actually coming at the question from the opposite end because I think a grease nipple in the hub would be a bad idea in a high speed wheel. Filling the hub with grease (assuming one side sealed bearings as in stock) would likely, almost certainly, push the seals out of one or both bearings. The grease escaping would spray out and slide up the rotor.
If one has installed double sealed bearings as most of us do, the grease would apply hydraulic pressure to the bearings which would side load them and might push the inner seals into the bearing separator.
I'm interested as to what might have been the intention. Adding oil by way of a plug, as do some heavy truck hubs, would not seem likely as it would tend to wick out between axle and inner race.
Odd location for either grease nipple or plug so it bothers me as the provision for something seems indicated.
We did some tech days to install a bunch of rear suspension grease nipples but don't think I'm ambitious enough to do this bike. ;-)
I'm wondering if you'd do the nipple install again? Huge amount of work to do the whole suspension.