A simple way to store your weights with a diameter of 45cm. 

The model was printed with PLA and a 0.8 mm nozzle with 0.4 mm layer heights. For me it was allready really stable with a low infill of 10% and a wall perimeter of 2.

 I used superglue with the pegs ("Stecker") to fix them together. It holds quite well. Only the 5kg weight is a little bit flimsy. 

It was designed for these specific weights https://www.simpleproducts.de/hantelscheiben-50mm/bumper-plate-sets/1409/bumper-plate-set-sqmize-bbp150-150-kg?c=163 with the thought in mind to be able to grab any weight at any time.