forced obsolescence

  1. Sandwich

    9Spd kind of sucks. 8Spd?

    So my chain thread brought up a good point. 9spd sucks and really doesn't work for DH. YMMV, but what's required to go back to 8spd? Chain cassette and shifter, obviously, but do I need a new dérailleur or freehub, or are they compatible?