because it will shake your car to death Because neither the new tire or your old rim are perfectly balanced by themselves.
Yes
Could be your tires need to be balanced or you need new tires.
when they are no longer balanced.
No. If there had previously not been any alignment issues, and as long as the new tires are properly balanced, you will not need an alignment.
you need to have the tires rotated and balanced if they are not in the best condition you probably need new tires. If your tires are fairly well and you had that done try an alignment.
Tires are out of balance. Have the tires balanced.
Yes, you should have balanced all 4 tires.
the rims may be un balanced if they were a cheap set. but you probably just need to have your tires balanced, any tire shop should be able to do this.
If they are already balanced then no you dont. but if they are not balanced yes you do. If you dont you will wear out the tires faster than if they were balanced.
Your tires probably just need to be balanced.
it depends on when it vibrates. If it vibrates when driving then it is most likely that you need to get an alignment or your tires balanced or maybe even loose lugnuts on the tires. If it is only when braking then you probably need new rotors or you need to get yours resurfaced.
You need new rotors or they need to go on this belt at the mechanic that re groves them.