This fits Traxxas vehicles like the Hoss and is a replacement wheelie bar wheel. They seem to last a decent amount of time even without full infill, give you custom colors, and can be made without driving anywhere.
There's an alternative one called “Square Profile” in here that has a flatter profile, works just fine, and prints easier – but it isn't as close to the actual factory design.
I've included pictures of both, added to the car at the same time and had the crap beat out of them.
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The author marked this model as their own original creation.