Costco did not want to sell me new tires...

Now I’m on a tear: marked one foot from fulcrum (one 3/8” and 1/2” torque wrenches, 9” on the shorter 1/4” one, and adjust by 9/12), put a known weight at the marks, with the torque wrenches roughly horizontal and set to that weight. Shifting the weight fore and aft of the foot mark (or 9” mark) allows you to see the threshold conveniently.

 

On a tear or a wild goose chase. I loosen the lugs and torque myself EXCEPT when Costco has touched them. They use a torque wrench. Most shops simply use their air tools.