The Kitbot on Steroids was designed by Team 1114 to provide a simple and inexpensive drivetrain for teams to use that is both robust and highly effective. Over the years, many teams have used this style of drivetrain with amazing successes, including numerous regional winners. The best part of this drivetrain is that it's very simple to assemble, allowing you to spend more of your build season working on mechanism design, programming, and practic. Also, it's simplicity and robust nature ensures this drivetrain will keep running all season long with minimal amount of maintenance.
For more information check out http://www.simbotics.org/kitbot