Brake disc rotor

摘要

A brake disc rotor includes: a pair of disc-shaped sliding plates provided in parallel with and separately from each other in the axle direction; a plurality of partition walls radially provided between the sliding plates; a plurality of passages radially formed between the plurality of partition walls; a plurality of inlet and outlet openings communicating with the plurality of passages and opening inward and in the radially outward direction; and an inclined portion formed on the surface of the inside sliding plate opposed to the outside sliding plate such that a distance between the inside and outside sliding plates is gradually decreased in the radially outward direction.