The build began as a simple two-motor, skid-steer RC car build with a fan for suction. Controlled by a smartphone app, a cheap Arduino board with an HC-05 Bluetooth module ran the show.

[Michael Rectin] is in on the action, and he’s been exploring how to 3D print a decent set of tires to help his RC car reach higher speeds mph. His first efforts involved experiments with TPU.

Bringing engineering and creativity together, this LEGO RC car features a fully functional 4-speed manual gearbox. Designed for smooth shifting and enhanced control, this build takes LEGO ...