Hi Iâm Kelly Jordon, Team Yamaha Pro. When youâre using crank baits while fishing for bass, I always use the smallest line I can get away with. It helps you get more depth, and also the bait swims in a more natural fashion. Itâs really important to use as light a line as you can get away with, taking in all the factors like cover that youâre going to be around in, you know what you need. I generally start around 10 or 12 pound test.By: Walker Agency