UGears STEM LAB Differential 3.8 Wheel Also great for modeling gravel

Also great for modeling gravel roads

two spacers and two M3 x 16mm mounting screws

3" Crawlers

Where this differs from an ordinary attack vehicle

UGears STEM LAB Differential 3.8 Wheel Also great for modeling gravelUGears STEM LAB Differential Learn how the manual DIFFERENTIAL works: The Differential is a stylized educational model, an interactive study guide to the mechanism, only for learning its essentials and principles of working. The Differential was designed to ensure that the drive wheels sitting on the same axle rotate with a different rate and cover different distances at the same time. This mechanism allows the car to make turns without the wheels