Stop bed frame wheels from moving?

Put small plastic bowls under the wheels. Or glass ashtrays.

You can find little carpet protectors that have a rim around them. Even just two should keep the bed from rolling around. Here's a link to one example https://www.walmart.com/ip/2Pk-3-Brn-Sq-Furn-Cap/39105700

https://homefixated.com/how-to-stop-bed-frame-rolling/

shims. Door stops.

Put rubber furniture cups under the legs of the bed . They fit most furniture legs, and you position them by lifting the bed and slipping one under each leg. If you can, be sure to tap the bed casters out with a hammer when a helper lifts the bed.

https://ask.metafilter.com/15609/How-do-I-make-a-bed-on-wheels-stay-put

A cheap easy fix would be to "Tap" in a wood "Shim" above the wheel, to jam the wheel tight so it won't roll. Hope this helps, it's the first thing I thought of to fix your problem.

I've had this situation and used rubber squares I cut up from a larger piece.

there are now rubber covers that go on the bottom of furniture legs. They are clear rubber that stretch right on !!

The easiest way is to take them off. Lift up on the wheel as your turning counter clockwise, they are removable. That's what I did to mine.

Lift up on the wheel while your turning counter clockwise, they are removable. That's what I did to mine. I hope that helps.

Tie the wheels of your metal bed frame to the floor to prevent it from moving is an unusual method of securing them. Simply make sure you have something to attach it to.

Buy some non-slip shelf liner and cut pieces to fit under the wheels.