I have tried using the search features and the stickied post here, but I have been unable to find an answer to my question.

My dad works for a company that manufactures speakers for a variety of companies including Pioneer, Kicker, and Directed Electronics. He is able to get me new speakers for my truck for free, but my options for sizes of the speakers are limited. Which, if any, of the following size speakers will fit into my truck?
- 5" round
- 5.25" round
- 6.5" round
- 4"x6"
- 6"x9"

I already have 1 pair of 5x7's, but I need a second pair in order to change all 4 speakers.

Thanks in advance for the help.

 

You could make any of those work, you'd just have to get creative on the way you mount them. IIRC, people have been able to put 6x9s in the doors by trimming.

If it were me, I'd go with either the 4x6s or the 6x9s...

 

take out the stock speakers and measure them

 

lemme save you the time. the stockers are 6x8s

 

I'd go with the 6.5" round. You can also buy conversion plates for these - 6" x 8" to 6.5".

 

6.5s is what id choose