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Small Robot Wheel and Tire

  • 28114: ActivityBot Encoder Wheel and Tire
  • 28114: ActivityBot Encoder Wheel
  • 28114: ActivityBot Encoder Tire
Product ID: 28114
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One replacement wheel and O-ring tire. Originally custom-designed to work with the original ActivityBot Robot Kit's external encoders, this wheel is now also included in Boe-Bot Robot Kits, Robot Shield Kits for Arduino, and ActivityBot 360° robot kit.

Key Features:

  • O-ring tire stays securely in place between the tabs on the wheel's edge
  • Wheel press-fits onto the splines of Parallax's original Continuous Rotation and High Speed Continuous Rotation Servos
  • Encoder wheel spokes are designed to use with the ActivityBot's included Encoder Kit. 

Note: Each Boe-Bot, ActivityBot, Shield-Bot, and cyber:bot kit includes 2 Encoder Wheels and O-ring Tires. 

Looking for more traction? Consider our Robot Wheel & Molded Tire.


  • Wheel: 64 mm diameter (tire adds 2 mm) 
  • O-ring: 1/8" size 228 NBR

Kit Contents:

  • (1)  - Encoder Wheel (#721-00021)
  • (1)  - O-ring Tire (#710-00200)

Additional Resources