Specifications of the front hub:
Brand: Shimano
Type: HB-RS400
Colour black
Number of spoke holes: 24GTS
Brake type: Rim brake
Axle type: Dropout axle
Axle included: Yes, dropout axle
Bearing type: ball bearings
Average weight (GR): 150
Intended use: Racing

Data for when using the Sapim spoke length calculation tool:
Installation width of the hub (MM): 100
Left side (MM): 14
Sprocket side (MM): 14
Left side hub diameter (MM): 38
Hub diameter sprocket side (MM): 38

Link to spoke length calculation: www.sapim.be/spoaklength calculation