There are many different sized vehicles.
It is not recommended to use different size tires on a vehicle at the same time.It is not recommended to use different size tires on a vehicle at the same time.
First off you should not install tires that are not the correct size. But if you do, make sure the tires on each axle are both the same size. Both front tires same size, and both rear tires same size.
By ratio if you mean size, the answer is no unless the car comes from the factory with a different size rear tires than front tires like some sports cars. In that case you would have 2 tires the same size on the front and 2 tires another size on the rear. You should never ever run 2 different size tires on the same axle. Therefore you would never have a situation where you would have 3 tires one size and then 1 tire another size.
No, not less one of the tires is out of balance. But it is never, ever, a good idea to have two different size tires on the same axle. This is a big no-no.
yes
Front to back, no. Side to side, yes. If the tires are directional, no.
Different size tires and wheels. The factory size tires and wheels are calibrated with the speedometer. If a different sized tires or wheels are put on the vehicle, the speed can be off.
There is no general size for SUV tires. SUV's come in several sizes and in turn there are several different size tiress that are need to accomadate SUV's
Sure, you can balance the tires. Any place that sells tires can balance your tires. You cannot rotate the tires as you have already stated they are not the same size. Balance but do not rotate.
NO
1 tires, 2 your alignment. But if your tires are a different size you will be all over the road.
yes