Strong vibration on highway..... help

[Jedurso]

Hi all. 2010 yaris. 105 thousand miles. 500 miles highway weekly.
So, I have a strong vibration and pulling to the right. Most notiable on highway. Took for an alignment, didn't help. Took back 3 days later, realignment, didn't help. Say it's suspension.... okay. Tire rods are fine, control arms are fine. Where am I looking????? I have new spark plugs, coil packs, fuel injectors, and belt. Also took off and cleaned my throttle body and rear breaks are a month old. I do need tires.... can it be that simple?. Please help, this is my only vehicle and it has to last.

[ex-x-fire]

The tires could be causing a pull, try crossing the fronts. If it pulls the other way then its the tires, if not then its an alignment issue. Did you get a alignment print out?
The vibration could be tires or an axle shaft. Get the front up in the air on jack stands, block rear tires, e brake on. Have some one get inside it and put it in drive, have them load it by applying the brakes a little. This may make the vibration show itself. If it is vibrating, look at the engine/trans, is it moving side to side a little? If so then I'd suspect an axle. Look at the tires, do they look round, even a small bulge will cause issues.

[enviri]

check your shock/struts. It could be as simple as your tires or wheels, yes...CT roads suck! (unless you live on rt 8, minus random debris)