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. A different scenario is if you already have an adapter on your frame. E.g. if you have a 180mm rotor with an existing 160mm-180mm adapter purchase a 160mm-203mm adapter to replace your existing 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.
• If you want to be able to return the adapter you'll need to keep it in mint condition which is best achieved by nipping the bolts up very lightly to check that you're happy with radial alignment

And finally, the 200mm - 203mm adapter

Introducing the 200-203mm adapter. Yes, it's two washers (aka rocket science). Put them under your adapter/caliper to space it outwards. This will allow you to get that additional "3mm" (of diameter, not radius) so you can run standard-sized discs, instead of being locked into expensive sram rotors. Use it to space a 200mm setup to a 203mm rotor. Or use it in conjunction with an adapter, for example spacing a 200mm fork mount to a 220mm rotor. 

The washers are stainless steel. No, we don't sell them in black 😊