Glossary “unidirectional rotor” Definition:
Rotors with cooling fins that are curved or formed at a angle to the hub center to increase cooling airflow. Because the fins only work properly when the rotor turns in one direction, unidirectional rotors cannot be interchanged from right to left .

Glossary “unidirectional tread pattern” Definition:
Tire tread pattern that can be rotated only in one direction. Thus left to right rotation cannot be done.

Glossary “unidirectional glass cloth” Definition:
Fiberglass cloth with the fibers running mostly in one direction.