Has 6 wheeled designs surpased tank treads

[jimfortytwo]

One of the most interesting things I saw at nationals last year was a compromise. There were a few teams who ran 6 wheel drive robots, but each wheel had a notch in it to accept a timing belt loop, on each side of the robot one loop ran around all three tires. During normal operation I image the current leaching effect of tank treads wasn't a problem because the treads barely touched thr ground, but when climbing stairs these robots worked as well as ones with a full set of treads.