The hub has a black freewheel cap and can be removed so that a roller brake can be fitted.
Can be used for both freewheel and roller brakes

Link to spoke calculator: Specifications of the rear hub:
Brand: Shimano
Model: Nexus Inter 5   SG-C7000-5R

Color: Black
Number of spoke holes: 32GTS
Type of brake: Rollerbrake
Number of gears: 5S
Type of axle: Fixed axle 203 MM
Axle included: Yes, without nuts
Type of bearings: Ball bearings
Weight (GR): 1670
Intended use: City



Data for spoke length calculations using the Sapim spoke size calculator:
Total length of the hub (MM): 132
Non-gear side (MM): 34
Gear side (MM): 39
Hub diameter non-gear side (MM): 92
Hub diameter gear side (MM): 92

Link to spoke calculator: www.sapim.be/spoke-calculator