Tested with PLA-CF carrying original SCX 10.3 JLUR wheel & tire combo. Had 0 issues the entire time I had it mounted which is about 20 hours of wheeling and counting.
Can be printed with regular PLA, model is quite thick and reinforced. Strength profile is recommended.
Attaches to the original license plate wholes, original hardware can be re-used.
2 Versions are available: