I bought a late 70's steel bike in January and it has a standard double crankset (52/39T) with 14-30T (6 Speed) in the back. My cadence is flagging a bit while climbing long hills (and a local mountain). There is a bike swap this weekend and I'm thinking about keeping my eyes open for either a compact or triple. What do I need to know or look out for? Is this something I can just switch out? Will the FD need to be changed or just adjusted?
I'm really leaning towards a compact because I'm not dieing on the hills but I could use a bit of a lower gear for the mountain climb.