The special bore makes it suitable for the extra wide (max. 3.0 mm wide) aero spokes.

Specifications of the front hub:
Brand: Novatec
Model: A291SB
Color: Black
Number of spoke holes: 32GTS
Type of brake: Rim brake
Type of axle: Drop axle
Axle included: Yes, quick release
Type of bearings: Industrial bearings
Average weight (GR): 77
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): 16
Gear side (MM): 16
Hub diameter non-gear side (MM): 30
Hub diameter gear side (MM): 30

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