Also, anyone know the reason behind the 45 lb plate? I was just wondering. I mean we have 2.5,5,10 and 25 pounds. Why not 50 lbs? You can make almost any weight you want with those. I’m thinking there must be some sort of historical/traditional reason.
I don’t know for sure, but if I had to take a guess I’d say it’s due to converting metric units into avoirdupois. 1,2,5,10, and 20kg plates would turn into 2.2,4.4,11,22, and 44 lb plates, rounded up or down to 2.5,5,10,25,and 45lb plates. Same with the bar.
actually, the 45 pound number comes from the approximate net weight of an old steam convector that is melted down after all its impurities and rust is removed. York heating company used to recycle these steam convetors and make cast iron workout plates out of them back in the 1960’s. (some of the older lifters on here might have seen these york plates back in the day)