Just a brief post on the correct speaker sizes for a '92 Ford Ranger supercab.
A lot of the websites give confusing info as to what speakers will actually fit the 92 as apparently it was the year of transition from small speakers to bigger ones.
Here is what I got from a local car audio dealer here in town. According to the installers, the 6.5" round speakers will fit the doors, while the 5x7" ovals (6x8") will fit in the rear panels behind the seats.
Apparently Ford went with 5.25" rounds for both the front and rear speakers in early versions of the supercab. Since then, the 5x7/6x8" ovals became the standard speaker, I think front and rear for some models for later Fords.
Just thought you'd like to know