i have realized that when lifting with bumper plates it seems that the weight feels heavier as opposed to metal plates. I thought it was just my imagination until a friend of mine brought up a good point about since bumper plates are much thicker the mass is distributed further away from axis of rotation as compared to metal plates.
anyone have similar or opposing views on this?
they are in kilograms usually, so don’t correspond to your usual 45lb, 25lb plates etc.
forget the weight go by feel 
PS - your lucky son of a gun! :baddevil::
I suppose if the weights aren’t directly balanced either side of the pulling force, one side of the body would have to work harder than the other, and this effect could be increased with wider plates. Any thoughts?