The 40mm BO Motor Pulley Wheel 410 is a 40mm diameter, 4mm wide yellow plastic wheel specifically designed for the 410 BO DC motor — the standard gear motor used in the vast majority of beginner robot car kits in India. This bo motor wheel press-fits directly onto the 410 BO motor’s output shaft without any additional fasteners, making it the most commonly paired wheel for school and college line-follower and obstacle-avoidance robot builds using the yellow BO motor chassis.

The bo motor wheel price reflects a simple but precisely dimensioned robot car wheel — the 40mm diameter determines the robot’s travel distance per wheel rotation (circumference = approximately 125mm), which matters for encoder-based distance calculation and motor speed matching between left and right drive wheels. This 410 bo motor wheel’s yellow color matches the standard yellow BO motor body, and its plastic wheel for robot construction keeps the robot chassis lightweight while providing adequate grip on smooth indoor surfaces like classroom floors.

this yellow bo wheel’s 4mm width is narrow relative to the robot chassis width, meaning traction on uneven or slippery surfaces is limited compared to wider rubber-tired wheels — for better grip, a rubber tyre band stretched over this wheel’s outer rim is a common maker upgrade. Available from StemVolt wheel is well-suited for learners and makers building 410 BO motor robot cars and practical beginner line-follower robot chassis projects.