DrRonny on Thingiverse significantly improved the STEMFIE car: extra tires you can 3D-print using flexible TPU filament and place on the car's wheels.

Check out these tires and download the files from Thingiverse. Note that DrRonny also adapted the wheels to fit metal ballbearings

Quick-print sample

STEMFIE.org Quick print sample shoulder screw pin nut washers brace

The STEMFIE Quick-print Sample file is an easy way to test a few STEMFIE parts and fasteners. You can also check the STEMFIE Calibration File for more elaborate types of fasteners.

Support

STEMFIE.org DOWNLOAD Parts

STEMFIE is a free, open-source, 3D-printable construction set toy that helps children learn STEM! Download the files freely, and please support my efforts to expand this project.