Bicycle disc brake hub

A bicycle disc brake hub (12, 12') is provided with a hub axle (31), a hub shell (32), a first spoke attachment portion (33), s second spoke attachment portion (34) and a brake rotor attachment portion (35) disposed adjacent the first spoke attachment portion (33). The first spoke attachment portion (33) has a plurality of first spoke holes (43), while the second spoke attachment portion (34) has a plurality of second spoke holes (44). The first spoke attachment portion (33) is disposed at the first hub shell end (32a), while the second spoke attachment portion (34) is disposed at the second hub shell end (32b). The brake rotor attachment portion (35) has a plurality of axially extending rotor mounting holes (50) with predetermined diameters (C1, C2) and center axes (A, B) spaced a second radial distance (R2) from the center axis (O) of the hub axle (31). The first spoke attachment portion (33) and the brake rotor attachment portion (35) are arranged relative to each other such that spokes (24) can easily be installed into the first spoke holes (43).