I'm new to mtb and have just purchased and waiting delivery on a Giant Stance 2, I would like to convert to a 1x9 with a smaller crankset, would I have to adjust my chain to suit a smaller single crankset, and is it simple to do? Many thanks
According to the Giant Stance 2 web page the bike comes with a 36/22 cranks and an 11-36 cassette.
You could swap the crank for a single chainring one. If the new chainring is between 36 and 22 teeth you will not have re-size the chain. If you want a chainring under 22 teeth then you will have re-size the chain and remove some links.
Breaking a re-joining a chain is not a very difficult thing to do, especially if the chain has a quick-link style connector. I linked a couple of Park Tool video's below.