The Ram Forum has this advice:
6.75 or 6.5 fit the front and back doors.
6x9 front (reason why smaller fits) and 5.25 rear. However, you can make any size fit any door if you are willing to cut metal and make spacers.
Dash speakers 3.5.
For a 1998 Dodge Ram 1500 extended cab, there are two different sizes of speakers. The front speakers are 6x9 and the rear are 5-1/4.
Front 6x9 rear 5 1/4. In Mega Cab it's 6x9 front and 6.5 rear.
You can go towww.crutchfield.com the have a program link that will tell you what the factory sizes for your vehicle. And the brands that make direct fit speakers. And it's FREE.
6.75
No.
The front speakers are 6x9" and the rear speakers are 5.25".
they are 6 and a halfs.
i think they are all 6.25"
6 1/2 inch speakers in both the front and back
How do you fold the rear seats down in the 2008 dodge ram 1500 quad cab?
6x9's in all four doors. Tweet's in the dash, most 6x9's are coaxial anyhow so forget the dash speakers. =)
6x9 in the front doors and 5 1/4" in the back doors. You can put 6.5" in the front with an adaptor plate.