What is disc?

disc brake fluid

Glossary “disc brake fluid” Definition:
Special fluid having a high boiling point, about 500¡ã F (260¡ã C). If exposed to air, it will attract moisture, which will lower its boiling point, making it unsafe to use.

disc brake

Glossary “disc brake” Definition:
Type of brake that provides a means of slowing or stopping a vehicle using hydraulic pressure to apply pads (clamping force) against a rotor.