Originally Posted by artdutra04

Although using a single loop of chain to power a four-wheel-drive robot may seem like a good idea (especially in the weight department), just remeber that "stuff" happens. At some point, that chain may break. If this said chain broke, your robot will basically be a paper weight for the remainder of the match. However, if you were to use two chains from the transmission - with one going to each wheel - you could still have at least one powered wheel if the chain broke. Thus, your robot could still "limp" through the rest of the match and try to score as much as possible. Redundancy is always a nice feature to have. :)