Fixed flywheels can only be installed on fixed flywheel hubs. Standard fixed flywheel hubs have teeth on both sides. One side has flat teeth and can only be installed on live flywheels, while the other side has stepped teeth and can only be installed on fixed flywheels.
The flywheel installation is rotated with tools in the clockwise riding direction
The fixing ring is tightened counterclockwise in the opposite direction to the flywheel tightening direction.