Which Spoke Tool for 2013 Hardrock Sport Disc 29er

I have not seen that model bike, so I cannot tell you for sure what you need. But, I can say that the black handled Park spoke wrench is the most commonly used (SW-0, I think). It fits all the wheels I have and is the most common for decent bikes. However, I don't know for sure which one will work based on the spoke size, as the nipple size can vary somewhat independently of that. The black park tool is just the best bet based on what I have seen.

So, you can just go and order that one. Or, if you want to be sure, take the bike into a shop and tell them you need a spoke wrench for it. Or buy something like the SW-7, which has multiple sizes.