Fopr [censored] years I have struggled with garage door that
is not "off its trolley" (overhead carrier), but has subsided,
(or the earth has subsided; it's on concrete) such that the
door scrapes along the concrete.

I have been moving it on a pipe, but want to do something
less primitive.

Do they make anything that can be screwed to both sides
of the door and has good-sized wheels to move door more easily?

TIA