1" Barbell or Dumbbell Weight Spacer / Adapter

thingiverse

This is an adapter for cheap concrete-filled PVC weight plates that have an inner hole diameter of 2.8cm to my barbell which has a diameter of about 2.4cm. Both are nominally 1 inch, but it seems that they played it safe on both sides, resulting in a gap that made the weights wobbly. Length is 59mm. Simple design made in tinkercad, but it does the job. The upper edge overhang is a bit difficult for FDM printing, but I didn't care to print it with supports or add an angle, and the print turned out good enough to fulfill its function.