These ball casters make a good third wheel for 3 wheeled robots, or you can use 2 for more balance.
With the Ball Caster, your project can pivot and move in almost any direction. There are two ball casters included, and height can be adjusted for various applications and projects.
The wheels are 3.5" in diameter and about 7/8" thick. They are modified to fit a splined servo shaft such as the HiTec standard servos.
3S JST-XH Lipo Balance Silicone Wire Extension Adapter with 20CM Brand new jst-xh 3S balance extension wire for use when charging your 3S lipo batteries.
This is a 4WD IG42 single bearing platform that is setup for outdoor navigation/positioning. A full array of sensor options including an IMU, motor encoders, and a Garmin 18x GPS that can provide position feedback with up to 3 meter accuracy.