Specifications of the front hub:
Brand: Shimano
Model: HB-R7070 105
Color: Black
Number of spoke holes: 32GTS
Type of brake: Disc (Centerlock)
Type of axle: Thru axle Ø 12 MM
Axle included: No
Type of bearings: Ball bearings
Average weight (GR): 158
Intended use: Race

Data for spoke length calculations using the Sapim spoke size calculator:
Total length of the hub (MM): 100
Non-gear side (MM): 27
Gear side (MM): 13
Hub diameter non-gear side (MM): 44
Hub diameter gear side (MM): 44

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