I currently have a road bike with the following setup for the gears:
9-speed Tiagra front and rear derailleurs, Sora shifters, all from 2009: 30/39/52 Crankset 11-25 Cassette.
I need some more low gears for hilly areas, and I am thinking of switching to a 9-speed Deore XT derailleur and 11-32 cassette. Is it possible / compatible? Do you think that cross-chaining would be an issue? Will I need a new chain?