Originally Posted by
plasticmaam12
The Nexus hub is spec'ed on hybrids and city bikes. The Alfine is a more rugged hub and better suited to mountain bike applications.
The Nexus 8R36 has the same internals as the Alfine 501. Alfine can take a disc, Nexus is roller brake (or coaster if you get the 8R31). Both have have the great seals. The older Nexus 8R20/21/25/27 are not well sealed.