High On Testosterone
When it comes to evolving with the coming age, biker gangs are not very progressive even now. Along with their official ban on the multiple races in the biker gangs, another ban is on women gang membership. Even if they get to be connected with a gang, they are not allowed to have full privileges.
The females wanting to link themselves with a gang can only reach up to the rank of an “associate” but can never become full members of the gang with equal rights. We guess there is too much testosterone in the biker gangs that stop them from accepting women as their equal members.