I have designed, created, and then tested these wheels personally, and they are very tough & durable.
I used my FDM 3D printer, using the following seetings:
Material: Nylon, 1.75mm 1kg
Temps - 250/60c
print speed - 40mm/s
infill% - 100% (it has to be durable & (strong)
layer height - 0.1mm
support type - touching only the build plate
White nylon tends to soak up a lot of staining, so I only have the white ones to use for shelf queen displays :)
These wheels are designed to fit any 12mm hex hub for 1:10 scale rc cars, such as the Tamiya TRF419X any any other on road/ touring car that has a 12mm hub setup.
These wheels have a 0 (zero) offset.
Enjoy, and stay tuned for for!