Which of the following setups is most common for a chain drive system?

The most common setup for a chain drive system is a single chain on a single sprocket. This configuration is prevalent in various applications, ranging from bicycles to machinery, due to its simplicity and effectiveness.

A single chain on a single sprocket allows for direct power transmission with efficient energy transfer and minimal slippage, thus ensuring reliable operation. This straightforward design also simplifies maintenance and replacement, as it involves fewer components and lower complexity compared to setups involving multiple chains or sprockets.

While other setups, like multiple chains or a combination of chains and belts, can be found in specific applications, they are less common in standard chain drive systems. These configurations might complicate the system, introduce additional points of failure, or be used for specialized functions that require more complex arrangements. Therefore, the single chain on a single sprocket setup stands out as the foundational and most widely used design in chain drive systems.