Not 'required' , but certainly a good idea.
no
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 need an alignment to ajust your camber most vehicles wear the inside of the tire on the front and middle of the tire on the rear. Rotating your tire after a proper alignment every 9000 to 12000 mile will inprove your tire life. Four wheel alignment should cost $65 to $100 front wheel 50 to 85.
Assuming that the car has four tires, those four will wear at roughly the same rate, so you would have to replace 4 tires at 36000km, leaving one as the spare for the next set.
the ford ranger does need a four wheel alignment over time. As anything else wear and tear will take effect and things shift and move. I suggest doing an alignment at every purchase of tires. Newer models of Ford Rangers call for a caster and camber bolts. There is no way to align the vehicle without them. I have purchased these kits from 30-12- bucks for each alignment
Depends on how worn they are. Minimum recommendation is that both wheels on the same axle(front or rear) are replaced simultaneously anyhow, and not just one of them. Also, put the best tires at the rear.
Do all of them need to be replaced? Also depends on if you want them all to match.
wheel balancing is to balance four wheels. wheel alignment is to straight four wheels.
I had a similar situation shortly after replacing all my tires and though the tires were brand new they did not replace the valve stems and they had slow leaks in two of the four tires, this may be your problem. The tire pressure sensors can be very sensitive.
380.80
It could have to do with the brand of tires. Our 2005 Ford Five Hundred had Continental Tires on them. They were well under the mileage rating, but were very loud. We thought there may be something else wrong with the car, but when we took it in they said it was the tires. They were "cupping" and were very loud. The front tires, needed to be replaced rite away as there was metal showing through. From what we understand there has been allot of problems with Continental Tires. We were also told by an insurance adjuster who came to look at our car after an accident that he has had allot of claims where continental tires were an issue. We have replaced all four tires, and the car is quite as can be.
Yes its possible to switch those tire sizes, the biggest concern would be how many tires are being replaced? if all four are changed it would not make much of a difference. i would not recommend having two different sizes though