How can I tighten the bottom bracket on my bike?

To tighten the bottom bracket on your bike, you will need a bottom bracket tool and a wrench. First, remove the crank arms and then use the bottom bracket tool to loosen the lockring. Once the lockring is loose, use the wrench to tighten the bottom bracket by turning it clockwise. Finally, tighten the lockring back in place and reattach the crank arms.