no, bad alignments come from potholes or front suspension parts needing replaced like your tie rod ends or idler arm.
Bad tires and bad alignment can cause the car to shake at certain speeds.
Your alignment could be off. Meaning your tires are either facing out a bit, or facing in a bit. This can cause your tires to go bad. Your local garage should be able to do a alignment on your vehicle to straighten things up.
Bad alignment
My van has bad tires at front and better ones at rear, should wheel alignment be performed with bad tires?
Not necessarily. If the car was in alignment prior to getting the new tires, it will be in alignment after the new tires. It isn't a bad idea to check the alignment periodically and it is probably better to check it more frequently than when you get new tires.
The tires have nothing to do with alignment. The car could be aligned with the scalloped tires. They are scalloped from bad alignment, shocks, struts or damaged to the front end. An alignment in itself may not fix the problem. There may need to be some new parts installed before the alignment. You only need to replace the two scalloped tires. A four wheel alignment can be done with new ones on the front and old ones on the back. Rotating them at some point will not affect the alignment.
You could, but it would be more accurate with new tires.
Out of alignment or bad shocks or struts
Before-a bad alignment cannot "unbalance" a wheel, but an unbalanced wheel, if bad enough, can throw off an alignment.
bad tires, wheel alignment , bad tierod ends, start with tires may just need balanced...its the cheapest
yes
One of your tires is bad, or you need an alignment. or you are a woman