The wheels are 4.5" in diameter and about 1 1/8" thick. There are two wheels included and they are modified to fit a splined servo shaft such as the Hitec standard servos. It includes 2 long screws for mounting the wheels on the servo shaft.
pack of 2, 12mm Hex wheel adapter for 6mm shaft
light-weight aluminum shaft adapters convert a typical motor output shaft into a 12 mm hex shaft that is compatible with many RC wheels.
YDLIDAR G4 LIDAR is a 360-degree two-dimensional laser range scanner (LIDAR)