MAGURA QM41 BRAKE ADAPTOR - IS REAR TO 180mm ROTOR

Magura QM41 Adaptor for a 180mm Rotor on Rear IS Mounts
Adapts International Standard (IS) mount to Post Mount
Allows use of 180 mm disc on a rear brake IS mount
(International Standard, or IS, mount is a disc brake mounting standard that uses a set of two mounting tabs spaced at 51mm apart)