Was looking for a basic basher rim with some offset to mount my stock tmaxx tires on but couldn't find one, So revised a smaller rim to fit my need. 14mm hex but unless your printer is perfectly tuned you might need to scrape the inside of the hex a little to make it fit.
I printed in PETG with 20% infill and fairly thick walls and they have held up so far.
If you print them please post a make, thanks!
Update: I managed to knock the centers out of two of these rims after a few runs. I would suggest you use these rims with washers to support the nut.