Written specs in FSM are the specs
Wanting to wish them away is foolish.
It is not normal to have even 7 grams of weight on a Michelin tire due to their precision build and extreme standards of perfection!
Now wheels are another matter as they can be damaged in transport or just shipped due to lower quality and reputation.

Not understanding that the wheels must FIRST be made PERFECT then mounting PERFECT tires always leaves one far away from PERFECTION.

Everyone has different standards but exceeding Infiniti Standards always end up with vibration problems.

 

The usual problem is not balancing tires and wheels at operating temperature. Even 20F variation will change some [many] tires.......................try using a big hair dryer to blow warm air on tires to reach 120-140F operating temperature in Summer.

Winter vibrations are harder to simulate without hauling the Radial Force Machine outside.

The cold setting of the internal plies is a common problem most ignore as the tires do warm up after enough miles.

Any vibration that changes with tire temperature is very obvious as to the cause of problem.