Update 26Feb2022: I've been using the same ring I first printed and can say they have stood the test of time. No signs of wear. Highly recommend if you have some straps and want some gymnastic rings.

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Gymnastic Rings to Olympic specifications (Mk3 beds scaled down to 94%)

This project started with the COVID-19 Pandemic and the Quarantine. I wanted to have some Olympic Rings to start doing some Calisthenic exercises and Ring Exercises. There were other non-ring shaped "rings" but those are not a good shape for muscle ups and other ring transition exercises.

There had been talk online about how this shape is not strong enough to hang from straps. I doubted this so I printed some to experiment. I've been using these for 8 months now and I can say they are 100% firm. I know they can at least hold 74kg (163lbs) on one ring alone since that is how much I weigh.

PLEASE FOLLOW PRINT INSTRUCTIONS!!!

For modifications I've provided f3d files for easy editing in Fusion 360

Legal: I am not responsible for any injuries caused by use of this design. Use this at your own risk.

Print instructions

I have included the g-code to the model I printed out of eSun PETG.
Make sure to sand the ring down as a post-process.

I do not know if these will work with PLA but leave a comment if you give it a try.

If you are not using the g-code please print with 10 vertical shells (perimeters). This provides most of the strength of the ring. I then used gyroid infill at 20-25% (I don't remember) I also printed the solid ring stl. I have not tested the one with cells so use those at your own risk. The cells should add some structure interiorly instead of just being infill so theoretically stronger and lighter.