Out of alignment or bad shocks or struts
The humming noise is dependant on the road surface/ tire tread and tire wear. If the tires are scalloped or feathered they will hum. Vibration may be a problem in your suspension or the balancing of one or more of your tires. You can run your hand over the tread (front to back and back to front) if it is wavy or the tread feels jagged/ sharper in 1 direction, you need suspension work and/or an alignment.
Incorrect wheel alignment, either excessive toe-in or toe-out. This can be solved by getting your wheels tracked.
Technically speaking the tires do not require alignment. It is the wheels and their axles that are aligned. The reason is that the attachment points for the axles are constantly moving and incur wear. In addition, the axle's supports can be bent by the vehicle hitting a pothole or striking a curb. The resulting misalignment causes the wheels and tires to not track properly (all point in the same direction). This causes the tire to scuff as it travels over the road. This scuffing wears out the tire prematurely and increases the misalignment. So the simple answer as to why wheels/tires should be aligned is to save the tires from being worn out before their time.
Low pressure in the tires can cause shaking, the alignment can cause shaking also.
Cordovan tires are made in Florida, USA.
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.
Scalloped tires, Bad wheel bearings,
bad brake rotors or alignment shocks struts
the tires themselves.
Scalloped Oak was created in 1758.
Scalloped hammerhead was created in 1834.
Scalloped Hazel was created in 1759.
tires
will tires make noise if there choppy on inside
It is usuall on the inner part of the tread, the tread lugs are worn with dips in it. It is different then feathered tires which have 1 edge of the tread worn more than the other- It can seen when bad, but it is easier to feel by running your had front to back and vis-versa. It will feel shaper in one direction. Scalloped is usually due to damaged/worn parts, feathered is normally due to excessive toe condition.
If the tires are properly balanced plug tires should not cause a vibration.
Misaligned axles, bad mounts on the tires, improperly inflated tires.