It depends on the year of the Alero. But for most General Motors vehicles the speaker size is 4 inch by 6 inch for the front door speakers and 6 inch by 9 inches for the rear.
Should be same as 2001 setup where you have to remove interior door skin to acess speakers, and the 2001 had 4"x6" ovals in doors.
If you are looking for the tire/rim size for a 2003 Oldsmobile Alero. It is listed here. Tire Size - 215/60/R15" Rims Size - 15 inches
6x9
30mm
the back speaker size is 6.5
What speaker size is in a Nissan sentra
The factory tire size for a 2004 Oldsmobile Alero is 255-50 R16. These tires can be purchased at stores such as Firestorm or Goodyear.
4x6
What is the speaker size in a 2000 ford explorer
Tires Size - 215/60/R15" Rim Size - 15 inches
225/50/r16
what is the front speaker size on maruti wagon r