Yes. Just buy the Avid 180/185mm rear disc mount and an Avid 180/185mm disc.al-r said:Is there an Avid adapter that would allow me to run a 180mm rear disc with a hayes mag caliper?
Tony I am looking to fit a 7 inch rotor using my Hayes HFX9 caliper, but the LBS says the avid adapter wont work (based on their experience). You mention a "hayes Psylo 8" front mount " adapter will work on the rear, are there different adapters for different forks to watch out for. Do you know if the Hayes G2 caliper different fitting from a HFX9?Tony said:Yes. Just buy the Avid 180/185mm rear disc mount and an Avid 180/185mm disc.
Note that you can also use a Hayes Psylo 8" front-mount bracket to mount a 7" (180/185) rotor on the back. If you already have an 8" on the front, it is a quick thing to do a test mount .
I am running a Hayes G2 caliper with an Avid 185mm rear mount and a Hope mini 185mm rotor. Works great.