Drivetrain Resources:

Drivetrain Design

Featuring the Kitbot on Steroids covers the selection of a drivetrain, the key principles and reviews the potential Kitbot upgrades

Mobility

Describes the different types of Robotics drive systems, some of the theory of designing a drive system, and some construction techniques and principles

Omnidirectional Drive Systems

Dives into the advanced topic of drive systems which can move in any direction