Dunlop advice:
"Wheels should be rotated at least every 2 weeks by 90 degrees to relieve flat spots that will form on the contact patch.
Tires must be correctly inflated before the aircraft is moved.
The crew might notice vibrations during taxi and take-off when the aircraft is operated for the first time after a period of storage. The vibration is caused by flat-spots and it should diminish during the first taxi and take off. Crews should be informed of this issue."
https://www.dunlopaircrafttyres.co.u...rked-aircraft/