Specifications of the front hub: 
Brand: BQ
Model: BQ-FH30518
Color: Black
Number of spoke holes: 36GTS
Type of brake: Rim brake
Type of axle: Drop axle
Axle included: Yes, quick release
Type of bearings: Sealed bearings
Average weight (GR): 118
Intended use: Race / Tour
 
Data for spoke length calculations using the Sapim spoke size calculator: 
Total length of the hub (MM): 100
Non-gear side (MM): 14
Gear side (MM): 14
Hub diameter non-gear side (MM): 58
Hub diameter gear side (MM): 58
 
Link to spoke calculator: www.sapim.be/spoke-calculator