Replacement caliper half for the M4 brake system. This is needed when changing a brake from one frame to another or from one fork to another, where a different style of mount is used. i.e. Converting a brake on a Manitou fork to Rock Shox Fork.
No3 Half used for 185mm Front or 165mm Rear International Standard 51mm Mount
No5 Half used for 165mm Front or 145mm Rear International Standard 51mm Mount
No8 Half used for 205mm Front or 185mm Rear International Standard 51mm Mount