A: We suppose saying “very carefully” wouldn’t be detailed enough for you? If you are talking about the bottom bracket beatings, then begin by removing your crank arms, spindle, spacers, kick stand, chain guard, flower filled basket and novelty license plate from your bike. The last four things on that list can go in the trash, you won’t be needing them anymore. You will need a drift (like a chisel, but with a flat, round head, rather then a point) and a hammer to remove your bearings from the inside out. DO NOT use a screwdriver or you will damage your seals or ruin the races. Slide the drift through one bearing and position it on the inner metal portion of the opposite bearing. If the inner spacer is in the way, use the drift to push it aside, very slightly. Start tapping the drift lightly with the hammer and work your way in a circle so the bearing is pressed straight out as pressing it out crooked can damage the frame. With one side out, you can remove the center spacer and hammer the other side out, just remember to only place the drift against the inner or outer metal portions of the bearing. Remember, go slow, you have all day to do the job right, but it may take you a few weeks to save up enough money to replace the parts from the mistakes you make.