Undished rear sprockets for all NuVinci hubs .suit a narrow 3/32 chain.

Dished 1/8 chain variant only available in 20t, this is maintain clearance from the hub interface

finish varies from nicket plated (flat dull) to chrome (shiny) some are solid some have lightening holes..will be sent at random unless you mention a particular style on the ordering notes section of the basket...

20 t dished sprocket is dished 2.2mm for the wider 1/8 chain.