• Blue color wheels 
• Diameter: 69mm or 2-5/8" 
• Width: 7.62mm or 0.3" 
• Integrated encoder disk
• Compatible with the Wheel Watcher Rotation Encoder
• Sold individually

Grab yourself a GMPW - GM Series Plastic Wheel (Blue), and get building that championship-winning robot! This wheel was custom made for Solarbotics by the people who make the standard servo wheels used on many Mini-sumo wrestling robots. They're made from beautifully injection-molded ABS plastic designed to fit the double-flat output shaft of the GM series gear motors. Gone are the rubber bands, replaced by molded-on thermoplastic silicon tires with superior traction & wear characteristics.

Take a Solarbotics GM2 - Gear Motor 2 Offset Shaft, GM3 - Gear Motor 3 - 90 degree Shaft, GM8 - Gear Motor 8 - Offset Shaft or GM9 - Gear Motor 9 - 90 Degree Shaft (RB-Sbo-01/02/06/07), add a spanky LARGE diameter wheel, and you've got a powerhouse combination that can take on any servo for less investment. The Solarbotics GMPW - GM Series Plastic Wheels are compatible with the Solarbotics Wheel Watcher Rotation Encoder. Use it if you need to control a robot for dead reckoning, tracking odometry (distance traveled), stalled motor, or closing the feedback loop for position/velocity/acceleration.