There are specific Alfine /Nexus trigger shifters, they work the other way to normal. Long push with thumb to go up.trigger finger to go down.
You use a chain tensioner with standard dropouts.
You need the correct anti rotation washers for the frame.
Sheldon Brown has the info SJS stock the bits.
I have a Nexus8 on my Dad bike and love it
There are specific Alfine /Nexus trigger shifters, they work the other way to normal. Long push with thumb to go up.trigger finger to go down.
You use a chain tensioner with standard dropouts.
You need the correct anti rotation washers for the frame.
Sheldon Brown has the info SJS stock the bits.
I have a Nexus8 on my Dad bike and love it