Originally Posted by
canam73
With out going to a triple I don't think you get to that gearing. But to get lower you will want to get an Apex RD and cassette (11-32) and you will need a new chain as your current one is most likely too short.
I can confirm that a medium cage Rival will work with a 12x32 cassette and you that will need a new chain. Your current shifters will be fine.