Originally Posted by kenandterry
This last sentence is probably why you hear about a lot of loose wheels flying off vehicles more in the spring and fall because of people switching out summer for winter tires in the Northern climates.
As if we donít have enough to watch out for already.
Having retired from a Tire Company I can't count the number of times our Dealers literally begged customers to come back a week or so after buying new tire/wheel combinations just to re-torque the wheels in order to prevent this problem.
Steel wheels are not usually as big a problem as aluminum wheels as steel wheel centers are "coined". They're stamped in a manner that leaves a bit of a cup where the lug holes are and when lug nuts are torqued some spring tension remains. This keeps the lug nut from loosening with heat/cool cycles as well as wheel flex while driving.
Early aluminum wheels were machined with the back face absolutely flat so when the lug nuts were torqued there was no 'spring' to help keep them from loosening during heat/cool, etc.
Most modern aluminum wheels have a back cut on the wheel that allows the wheel to "spring" slightly as lug nuts are torqued and the old problem has somewhat been solved.
Re-torquing is still important if one wants to really make sure they don't have a loose/lost wheel.