Using a commercial gym’s fixed-weight dumbbells as reference, is there a general standard for the diameter/thickness for the bar? Excluding fat bars, I know olympic barbells can range from about 1” in to 1 1/4” in diameter. Would this same range hold true for most dumbbells?
No, the rubber coated dumbbells are different than old time cast iron ones. Atleast at my gym they are
28mm give or take