cglrcng has a good point. There are quite a lot of different configurations of tracked vehicles. When I designed this track system I wanted it to be modular and highly configurable. So you could easily change your design.
One of my other customers is a University building a robot like what cglrcng mentioned. They ordered a set of Tank Chain and are in the process of upgrading their robot. They had problems with the conveyor belt they were using for track because it didn't have grip.
https://sites.google.com/a/vt.edu/am...-vehicle-mk-iv