Originally Posted by Shiznaz
I don't see myself in the biggest cogs that often, especially considering its a 11-34 cassette. The big cogs will be for slugging up mountains with gear and the like, so they probably won't see too much use. We will be definitely be going under 10,000km (probably more like ~6000km), so hopefully I won't have to worry about replacing any components on the way.
Sounds like a fun trip. I think you will be fine, if you start with a drivetrain that is in good shape. If you do need something, 9s chains and cassettes are available everywhere, and it's not like cassettes and chains suddenly wear out in a way that leaves you stranded-it's a really gradual process.