2016 Shimano Nexus 8 hubs use a new dust cover that will interfere with the Gates 22t CDX cog, please contact Shimano for B-spec dust cover that is narrower and will not interfere with the cog
alternate vendor part # CT1122XMNS
Superlight machined aluminum cog with interior guide flange
Visit http://www.gatescarbondrive.com/ or download the Gates Carbon Drive iPhone app for drivetrain calculations and tension analysis