I was always under the impression that B13's had 6.5''s all the way around. I go to pull them out, and there's a big metal circle that measures 7''s across, but the speaker itself is more along the lines of 5.75''x4''.
On my 1994 XE (1.6L), I had *stock* 4x6's up front and 5.25's in the rear. I solved that problem though by installing two sets of Alpine 6.5's. Rears dropped right in, but the doors needed a bracket to properly set them in. No problems since...
Ok, since no one can I agree, I'll ask. Did Nissan just throw whatever speakers they had laying around the factory into these cars?!!
I mean everyone says 6.5" so I get those. Well I have 5.25" stock speakers so I had to cut the back dash to make the 6.5"s fit.
Now I have no clue what's in the front, I'm assuming that Sentra94xe is right, since he was right about the rears.
This is really a stupid problem that we shouldn't be having.
The front speaker size seems to have varied from year to year and model to model. Some have 4x6s, some have 5.25"s, and some have 6.5", where mine had nothing up front to begin with. That's right kiddies, no stereo .
I agree with samo on this.... almost every Sentra B13 I have come across has had different OEM speakers. Could be a yearly deal, then again could be at what plant the model was produced (Tenn, Mex, Jap). All I know is that it is easily possible to fit 6.5s in both the front and rears. BUT, for example, a nice set of 4x6 components up front powered via solid amps will sound kick ass. It's all up to the owner and what he/she wants to run. Anything is possible, it just might take some minor modification for proper fitment.
yeah, i had the same problem being that i thought there were 6.5's all around... but magically the backs decided to have strange screw line ups, so i had to cut out some of the back, and the front speakers were i think 3 x 5's or something strange like that, but they were put in with that random 6.5 metal plate so i figured 6.5's would work... come to find out the magnet was too big and i couldn't fit the speaker into the door.... so i ended up putting 3x5's into the front because it was the largest thing that would fit. semi upsetting, but works out with two 10's thrown into the back.