Designed for my expedition trailer, which has got 96mm diam. wheels: https://www.thingiverse.com/thing:3543490
Works well with any RC car wheels around 100mm (1/10 or 1/9 scale).
You need 2 pcs. DIN912 M2 screws or similar to mount the holders.
I had problems with build plate adhesion, so I finally printed the chocks on their sides with a brim.
Printing the holders upside down should work fine without any brims.
No supports needed. Have fun!