Shimano SM-MA-F180S/P disc brake mount adapter. This specific adapter allows you to mount an International Standard (IS) caliper to a Post Mount (PM) fork or frame.
Purpose: Adapts a 51mm IS mount caliper to a 74mm Post Mount fork/frame.
Rotor Compatibility: Specifically designed for use with 180mm brake rotors.
Position: Primarily used as a front adapter, though it can sometimes be used on frames with specific mounts.
Material: Made of aluminum.
Included in Box: Typically includes the adapter, 2 fixing bolts, and 1 safety wire.