| 摘要 |
The present invention is to provide a brake disk capable of enhancing the turning performance of a motorcycle by reducing the inertia, and preventing deposition on a braking portion by reducing a temperature variation of the braking portion. A brake disk 1 is provided with a sliding disk 10, a hub disk 20, and a connection pin 31 for connecting the disks 10 and 20 to each other at plural positions in the circumferential direction of the brake disk 1. An engaging convex portion 12 projecting inwardly of the sliding disk 10 is formed on the sliding disk 10 at circumferential positions corresponding to the connection pins 31. An engaging concave portion 24 for receiving the engaging convex portion 12 is formed in the outer periphery of the hub disk 20. An insertion hole 12c for the connection pin 31 is formed in the engaging convex portion 12. |
