Wheels for floor standing speakers

Mozartfan, I beg to differ. Any enclosure a woofer is in needs to be rigid and heavy to prevent resonance and distortion. A subwoofer should be even heavier. My speakers weigh 200 lb. My subwoofers weight 200 lb
By buddies Magico S7's weigh 300lb. I doubt our OP is going to be carrying a Moab on his shoulder.

Jgreen19, do tell us how you like your new Sopra's and how they compare to the Moabs. Best of luck with them 🥳

Just make sure two of them have brakes or the speakers will move. You have to be careful with the screws. MDF will strip easily. Predrill the holes and use self tapping screws. Fill the holes with thin cyanoacrylate glue like Satellite City and run the screws in with only 4 nm torque. This is permanent but at least the casters will not loosen. MDF can always be repaired but matching the finish will be tough. You will decrease the resale value in any event.