I’ve turned my Poseidon X into more of a road bike and swapped a 46cm bar for a much more comfortable 40cm. The microshift groupset has an externally routed shifter cable that was purposefully long to accommodate a bar bag, but it’s now almost hitting my left hand. If I were to cut the cable shorter and feed it back into the derailleur, would I need to index my gears or can I just adjust the tightness with my barrel adjuster and be on my way?
I’d suggest indexing the gears again, especially if you have access to a bike stand. Some index shifting systems can be really picky regarding tolerances