Brake adapter - Post to post
Post-to-Post brake adapters are for mounting Post type disc calipers to Post type frames/forks. The adapters come in a number of different sizes, be careful to select the correct one! Each adapter comes with washers and bolts as per the product photos.
Adapters should be used to adapt from your fork/frame post mount to the rotor size desired. E.g. if you have 180mm post mount on your fork and you want to run a 203mm rotor then you should get a 180mm-203mm adapter.
There is a little bit of variation in actual caliper, rotor and mount designs so in some cases the washer included may need to sit between the mount and adapter to get the correct spacing.
Please note: These adapters will not work with flatmount brakes on road/gravel bikes.