So another season of pulling snow tires off to install summer wheels is in full swing. As has become all too common, vehicle in today for brakes just had it's snows pulled off last Friday at another shop and summer wheels installed. First nut, barely came off with a 750ft lb+ impact gun, next one saw the stud break clean off, other three ridiculously tight but at least didn't break. Checked the other three wheels, not as tight but clearly none torqued to spec. Just as ridiculous, substantial build up of corrosion on the backside of the alum wheels plus similar build up of rust on the rotor faces where the wheels need to sit flat. Car, accident looking for a place to happen. Just as shitty, wheels took pulling on with the lugs to get them to slide over the hubs left them so tight (even with nuts off) that it took one hell of a smack from the backside to remove them, awesome if you had a flat out on the road. No excuse possible for a pro, if you change the wheels over yourself, need to pay attention to the above and always always always torque properly. When installing nuts, snug up in correct pattern with a 3/8 ratchet and socket to ensure the wheel is squarely on the hub and sitting dead nuts flat. When it's time to torque, first lug, do not bring up to full torque, make full torque the second or third one in the pattern then make a second full circle. Yes pattern you use is equally as important.
Be safe.