Galfer Shark Disc Brake Rotor - 180mm x 2.0mm, 6-BoltGalfer's fixed version of the Disc Shark is one of the most complete MTB brake disc available today. Its innovative manufacturing process uses laser cutting to create the optimal design geometry and achieve the best possible performance. One of the disc's unique characteristics is the inner fin that gives it it's name: Disc Shark . These fins, together with the rotor's small internal round holes allow the operating temperature of the disc to be