Components / Instances?

If I'm modeling a car and create one wheel, is there a way to use that one wheel as a "component" for each of the 4 wheels? I realize I can copy and paste the wheel multiple times, but I'm looking for a way to "instantiate" a component such that a single "template" can be edited and all instances will reflect the changes.

Is that possible? (Sorry if I'm overlooking the obvious, but I can't seem to figure out how to do it.)

EDIT: Ok, it looks like Smart Folders might be one way to do this, but it's not clear if it's the best or only way.
 
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1 Using a particle array 2x1x2 will be one choice.
2 Using 2 arrays (X & Z) as modifiers works as well
3 Symmetry is another option; probably the best as you have hub caps
* In either case you have but a single object "wheel" in your object browser whilst 4 instances are shown in the editor.

Screenshot 2019-11-22 at 19.15.47.png
 
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