Originally Posted by
wroomwroomoops
...This Alfine S501 version of the Nexus 8, is this the one with the red line?
Red line isn't enough, needs to be the newer Nexus 8R31, 8C31 and 8R36 (which also have red lines). The 8R31, 8C31 and 8R36 red line hubs have the same sealing and internals as the Alfine 501:
http://bike.shimano.com/publish/cont...een%20Hubs.pdf
Lots of folks running these hubs to -40 in extreme climes with no issues.