Found this thread the other day after hearing this noise for the past 2 years… tighten the 4 bolts and my car feels brand new..: only 29009mil after 6 years so you know how frustrating an annoying thump can be!
Everything I’ve read on those wheels, wheels alone without any rubber is 39.5lbs. Add the tire , let’s say 235/50r20 at an average of 26lbs depending on brand.