Originally Posted by
Logan1
To the best of my knowledge Hi-Temps are 445 mm and the ones from Rogue, Titan, Vulcan and Rep are all 450 mm.
I am not a fan of some of the budget plates which have larger inside diameters (51mm vs 50.4). I wouldn't use 17 3/4" plates with 450 mm ones for deadlifts. If it voids Rep's warranty to use Hi-Temps with their 450 mm ones, I doubt many manufactures would cover using their 17 3/4" plates with someone else's 450 mm ones.
Although Rep does list the diameter of some bumper plates, their competition ones are 450 mm. Also, a Google search will reveal that their standard plates are also 450 mm. If I was planning on ordering Rep plates I would email or call them to confirm the exact diameter.