Yellow Rubber Wheels with a diameter of 3.7cm.

The Shadow Chassis is a marvelously durable and modular robot platform from RobotZone. 

Bracket Pair for Sharp GP2Y0A02, GP2Y0A21.

This acrylic expansion plate lets you mount a variety of components to your Rover 5 tracked chassis. The 3 mm wide slots covering the plate support many configurations of sensors and other robot components.

O Seguidor de Linhas é uma placa longa composta por oito sensores IR. Este foi desenhado para seguir uma linha escura (spray ou fita isoladora) num fundo claro de cerca de 7,6 cm de largura ou menor . 

The RoverC is a programmable omnidirectional mobile robot base compatible with the M5StickC and can be started with the insertion of the M5StickC. The main controller of the base is the microcontroller stm32f030f4. The base comes with N20 worm gear motors, which are directly driven by a four-channel motor driver. These motors are connected to the mechanum wheels, which can move in all directions. In addition, two Grove-compatible I2C ports are provided to facilitate expansion to other modules.

Tamiya’s steel-ball caster is a good way to give a “third wheel” to a small robot powered by a differential drive. The kit comes with enough parts to make two casters, either 25 mm or 35 mm in height.

Expansion Kit for 3pi Robot.