These lastic wheels are compatible with Solarbotics RW2 GM12a, 13a, 14a, 18 Gear Motors. It is an ideal for your robots with the structure of the rubber to increase the friction. You can use it for making Mini Sumo robot.
It is compatible with 32 mm diameter 11,2 mm thickness RW2 lastic wheels,GM12a, GM13a, GM14a, and GM18 gearmotors. This wheel is compatible with micro and mini metal gearmotors that have 3mm sized shaft input. The wheels are sold as a single.