Metal bed frames with wheels are usually the bed frames that come with the purchase of a new mattress. They don't take up much space and don't have a headboard or a footboard. They are convenient for rearranging furniture around a bedroom, but they do tend to scrape floors, like linoleum and hardwood, and aren't the most stable beds. And, if too much pressure is put on a particular side of the bed or if a wheel is banged while being moved, the bed may break or become crooked. Luckily, those wheels can be easily replaced with other ones, or removed entirely and replaced with bed risers and stationary bed legs.
Setting Up the Bed
To remove the wheels, prop up the side of the bed where the broken wheel is with other furniture like a sturdy chair, or have someone hold it up.
If your goal is to remove all four wheels, move the chair holding up the frame around to each corner as you remove each wheel, or take all of the bedding, the mattress and box springs off and then turn the bed frame on its side. Have someone hold it up or lean it against a wall for stability.
If the frame isn't very heavy, it can just be turned over and laid on the ground with the legs and wheels facing the ceiling.
Most of the wheels on bed frames are casters with a post. That means that most of them are industry standard wheels that fit into the grooves of the metal bed frame. They can be removed by simply pulling them out.
If a wheel does not come out after being pulled, wiggle the wheel around inside the stem to loosen it. If that does not work, try lightly tapping the top of the wheel slot with a blunt object to loosen it in the socket.
There are all kinds of bed legs online with caster sockets that will fit the metal bed frame or plastic socket adapters of the bed frame. The industry standard size for caster sockets are 3/8 and 7/16 so be sure to check that any legs that you purchase for a bed frame are fit those measurements. If the bed legs are 3/8 or 7/16 they should slide right into the bed frame just like the wheels are were able to be pulled out.