This is a robot drive wheel we had made specifically for us. It does not have a bearing. It is 6 inches in diameter and 2 inches wide. It's a solid foam core with rubber treads and outer layer. The steel rim is painted black with a 4 bolt pattern so you can easily mount it to a flanged hub.
2WD self balancing robot! This kit is a perfect plataform for learning Arduino, PID control, serial communications(Serial, I2C, SPI), PWM signals, IMU filtering, etc.
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.