Went from 17" to 18" wheels and had the new 18's balanced. Do I need a 4 wheel alignment?

 

Don't ya hate it when you ask a stupid question and nobody gives you a stupid answer...lol.
I'll be your huckleberry...Your good bro, no alignment needed unless something has changed in the handling.

 

Idnt that a daisy? allright lunger lets do this. lol one of my alltime favorites thanks mayo didnt think I would need one but wasnt sure

 

There is no adjustment to the front end or rear end that an alignment
can cure. If you are out, you have bent sub-frames that no alignment will fix.
Toe is the only adjustment on the front end you have. Swapping rim
sizes has no effect on alignment IF the rolling diameter of the tires
you installed (hope you didnt reuse the 17" tires on the 18" rims) are
the same as OEM tires.
Now maybe steering stops are in order here so you dont rub the carp
the inside of the tire during full lock to lock turns.