Flintlock,
I have a cement garage floor, w/ expansion grooves. I've experienced everything the other posters have experienced. Given the size and probable weight (400lbs +) of your implements, my experience would lead me to recommend that you go with larger castors, and not use steel wheels. As Offy and DaTeacha warn, floors that are not swept or blown clean will have that 1/8th of an inch-round rock that will stop you when you try to stage your implements. One other item---- when mounting/dismounting off of a pallet w/ an i-match or quick hitch configuration, I have to remember to pre-set the top link to level out how the i-match hooks hold the implement, otherwise the implement doesn't release cleanly.
v/r mark