This is a pair of solid core foam rubber tires with steel rims and a 1/2" steel shaft, 6mm bore, 1/2" ID ball bearing. They come as pair (2 wheels, shafts, bearings, collars and hardware). Formally TD-087-002. This item used to be pneumatic tires.
This 4WD robot is our easy to use robot for going into tight spaces with low ceiling height. It has a full pan and tilt camera with 10X optical zoom. Controlled wireless with a tablet as video is displayed in brilliant color.