So light a child can remove it from the truck

Jerry B wrote:
I know enough that aircraft landing gear are made from steel, not aluminum as the rest of the aircraft. Hummm, wonder why???? Also wonder why Blue Ox went from steel to aluminum on their tow bar hitch conections. Hint, steel is the superior metal where strength is paramount.

In that case, you have competing priorities for the landing gear. Pound for Pound, Aluminum is stronger. However, Volume for Volume, Steel is stronger. The aircraft makers needs to minimize the landing gear component size in order to minimize the space for stowage. Pretty simple. Remember, the aircraft's weight is primarily supported by the WINGS which are aluminum in which the main gearset is also attached to the base of in most examples.

Also remember, each application has its own set of requirements. Some items need maximum strength in a given dimension with weight being a low priority. Some are just the opposite. Engineers have to prioritize concerns and pick material based on that listing of concerns. It's a broad brush to stroke with just because the landing gear of most aircraft tends to be steel.