You can find all the parts you need at Escapa.
The Shimano Front/Rear Brake Adapter P-PM 203mmis used to mount a PostMount brake caliper on a PostMount fork or frame.
The adapter is compatible with 203 mm brake rotors and is mounted with a screw and a stop.
Features:
Adapter (180mm) to 203mm SM-MA-F203P/PM
Brake caliper: PostMount
PostMount: 180 mm
Mount: Front/Rear
Material: Aluminum
Color: Black
Mounting: Screw and washer
