From all the posts I've read, there seems to be a 50/50 split on using tire cradles to prevent flat spots if you plan to garage your car in the winter.

Some say it's vital to use them, while others say you can set the car on carpet mats and roll the car back and forth a few inches every couple of weeks.

To confuse the issue, I've also seen posts that warn against having the car off the ground or jacked, because of damage that could be done to the suspension. I wasn't sure if this applied to tire cradles. The tire cradle I seem to find at most websites looks like the same one and sells for $350 for a set of four.

Are tire cradles recommended if I plan to garage the car from December 1st through March 30th? Do they harm the suspension? Would rolling the car on carpet serve the same purpose and be just as effective?