FWIW, I've been storing various cars from about Nov. 30 to March 31 every year, since about 1998 & have never had a flat spot or howl.Some were run flats, most weren't, garage was unheated also. My garage is insulated with an insulated door & the temp inside was usually 5-10 degrees C (41-50 F)warmer than outside. Sometimes I parked the car on blue insulating styrofoam pieces, eventually gave up on that , used pieces of old carpet, or this year, nothing at all for the Z.
