To raise the height of your bed using risers, you must first remove the casters on the bed frame. The most common type of bed frame caster is the friction caster. These casters simply snap in and out of holes in the bed frame. Many times these casters have a sleeve that fits between the caster rod and the bed frame caster sockets. Removing casters is a straightforward process you can do at home with the help of a friend.
Remove the mattress and the box springs from the bed frame. Ask a friend to hold one side of the bed frame off the floor.
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Inspect the caster stem for a small pin in the side. Compress the pin with your fingers and pull the caster away from the bed frame.
Grasp the caster by the wheel and pull it straight out of the caster socket if there is no pin.
Insert a small flat-head screwdriver between the edge of the caster stem collar and the caster socket. The caster stem collar is the flange that rests against the caster socket on the bed frame. Twist the screwdriver handle to pry the caster out of the caster socket.
Tap the top of the caster wheel with a hammer to knock the caster away from the caster socket, if you're unable to pry the caster off by pulling or by using the screwdriver. Often one sharp blow with a hammer is sufficient to remove the caster from the bed frame.