ViNesvarbu

I have Giant Roam 2 bike. On my back wheel one of bike spokes broke. What tools do I need to replace spoke? I tried to find online info, but it appears to be complicated - it appears I need "Cassette lock ring" and "Chain whip". If I will consider buying them, what size/type do I need to buy them for my specific bike? Any good guides on how to replace spoke for similar bike with disk breaks?

dabac

Which side did the spoke break on?
Chain whip and cassette lockring tool is only needed if the broken spoke is on the drive side.
If the broken spoke is on the brake side, then it comes down to what rotor mount you have. One version uses the same tool as the cassette lockring. Another uses a bottom bracket tool. 6-bolt rotors generally use Torx screws.
Shimano cassette lockring tools only come in one size.
Chain whips aren't size-critical.
Spoke replacement is pretty much independent of bike type.

Remove what you need to get the new spoke in.
Buy replacement spoke of right length and gauge.
Install, tension and true.