Rogue loadable dumbbells with bumpers loaded to 125 lbs. The rogue site says you can only fit 2 of the 15lb bumpers per side. The way the bumpers are made the collar
Pro-tip: when looking at loadable dumbbells, go with the Rogue db-10 over the 15. I use them WAY more. Just easier to handle for most motions. : r/homegym