W420 Mini Steel Ball Caster Wheel

This compact wheel is ideal for small robot wheels requiring versatile balance. It fits perfectly with robot wheels and motor systems and provides smooth rolling for educational robots and DIY automation models. Furthermore, its precise ball bearing construction supports rubber robot platforms with low friction and excellent maneuverability.

It acts as a balance wheel for 2WD and 4WD robotic chassis, increasing turning efficiency and directional accuracy. It's a swivel wheel you can use in line-following, obstacle-avoiding robot kits and many other projects.