Whole car vibrates why?!
 

Hey guys so yesterday I went to go get my ebrake adjusted because I had new rear rotors put on and it needed to be adjusted it wasn't grabbing on hills. Anyways I was driving home on the freeway going about 80 and noticed that almost my whole car was vibrating I felt it vibrating from under my seat and behind me also the steering wheel was vibrating but was not shaking back-and-forth the tech that worked on my car did admit that it was really busy and he had to get me in and out because he does work on the side for me so therefore he admitted that he did drop the wheel kind a hard really quick by accident and one of the wheel weights might have came off also I have 20 mm spacers in the front and 25 mm in the back both bolt one by h&r. he said that it could be the wheel spacers but this never happen until I drove home last night ever since I got the spacers installed I had no problems until yesterday so I doubt it's the spacers but she said that a wheel weight might've fallen off causing the wheel to be unbalanced which causes the vibration I will have to wait until Friday being that it's snowing here and they are closed on Thanksgiving but what do you guys think could be the issue

*obviously he will not charge me to fix it if it is the wheel weights anyways he does work for me on the side I don't go through the dealer but it is a Nissan dealer and it only happens when going above 80 miles an hour I checked for nails in my tire and flat but there was nothing

You answered your own question, wheel weight or spacer not on right
You'll be ok

Re
 

Well pretty sure the spacers were put in right he's taken my spacers off like 10 times in just scared my spacers cracked then I'd have to get new ones km so broke lol

No way the spacers broke. More than likely a wheel weight. It's happens

do you have oem or aftermarket wheels ? if there aftermarket he could have lost or forgot a hub ring . ive seen this a hundred times people dont pay attention to the rings . if not more than likely he knocked off a wheel weight .

Oem

I'm with everybody else - sounds like a wheel out of balance. Since the steering wheel isn't shaking (and you had the rear worked on recently), probably a rear wheel. Tell your mechanic/buddy to be more careful from now on. ;) It sounds like it's a fairly large imbalance so I'd keep speeds to a minimum (parked, if possible) until you can get it fixed.

If a wheel weight fel off how much are they usually

Who put them on should be free of charge!

I would think a sticky would fall off before the clamp kind......but anything is possible.

Yeah I just hope Nothing's wrong with my spacers also when I'm rolling slowly I feel like I have a flat it's like an up and down motion a little bit that's prob the balancing ?

it sounds like your wheel isnt tight . check them now . if you can feel it going slow he either left your wheel or your spacer loose . thats not good . check your wheels and spacers before you drive . 55 plus is a balance issue rolling at a slow speed is deff something more serious .

If it is happening at a crawl then it's not the balance. Wheel/spacer may not have been mounted properly.

its not that noticeable maybe im just feelings things but true vibration is only at 80 mph or above everything else is fine maybe its just the roads i get paranoid sometimes