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I'm looking to upgrade a few things on my bike. the front rings/cranks are a bit banged up and occasionally drop the chain because they are a little warped/getting worn.
How do I go about upgrading this part of the bike, do I get a whole new chainset/crankset(what's the difference) do I need to get the same size of everything so that my gearing will still work? what in general should I be looking for when upgrading this part? pic related is what I have, its a 34/50t on a 9 speed cassette. my bike was a Kona honky tonk I got in 2015.