Tires: tire noise, tire placard, hyundai sonata

Question
I own a 2001 Hyundai Sonata, I've maintained the car on its regular interval as suggested by manufacture.  I recently changed all four tires to Goodyear Eagle Ls radial tubeless tires M45 p195/60R15  87H, since then I hear a rotation noise only as the engine is moving and increases and decreases with velocity so suggestive its the tires, it almost sounds like something is rubbing.  Could it be the wrong size tire? width?  the alignment and balance were done with installation.

Answer
Ed,

On every vehicle sold in the US, there is a sticker – commonly called the tire placard - that lists the original tire size and the proper pressure for that size.  The placard is usually located on a doorpost or in the glove box – but sometimes it is located in the trunk or on the fuel filler door.

I have a book that summarizes the placards,  If what I post next is not the same as the placard, then everything that follows after that is also incorrect.

Tire Guides says a 2001 Hyundai Sonata originally came with P205/60R15's inflated to 30 psi front and rear.

This means that the tires recently put on are smaller than the original tires.  this is not a good idea since this also means the load carrying capacity is smaller than the original and this might lead to a load related tire failure - and that sometimes has tragic consequences.

Not to mention the tire is smaller in diameter and that not only lowers the car a bit, but also, makes the speedometer read high - about 2%.

But you may be in luck.  If you use 34 psi as your target pressure, instead of the placard's 30 psi, you get the same load carrying capacity.  This, of course, doesn't fix the speedometer error.

However, this does not explain the noise you are getting - unless it's because the vehicle is riding lower, which doesn't make sense.

So if the tire shop selected the tires for you, I would go back there are point out the placard and tell them to put the correct size on - at their expense.

If, however, you purchased the tires yourself and had them installed somewhere by someone other than the folks that sold you the tires - well, you have to use your judgement about what to do about it.

But I would be tempted to take the car somewhere other than the folks who installed the tires and have them look for the source of the noise.  It is possible that the brake shield was bent during the tire installation.