New TRP post-mount to post-mount rotor adapters for rotor sizes ranging from 160 mm to 223 mm. Our new adapters use a simple and easy approach to help you get the correct fit. “P” stands for “Plus”, immediately followed by the millimetres needed to elevate the caliper to your chosen rotor. If you have a PM 180 fork, like a FOX 36, and you would like to run a 203 mm rotor, you will need to lift the caliper 23 mm, which will be our P23 adapter. Please follow the chart below to pick your correct adapter.