This is rev 2 of the SimpleSumo wheel designs. The old design worked fine but required you to print a good press-fit and that you use one of the two longer screws to attach it to the servo.
This design allows you to use the small screw to attach the wheel to the servo as is intended by the manufacturer.
Assembles via press fit with the round servo horn that comes with the FS90R continuous servo. Surprisingly no glue is required to hold them together, even in use!
.3mm layers thick max.
4 layers all sides top & bottom.
20% infill minimum.