Hi there, I have recently been working on a project that involves building a mechanical dolly that is driven by 2 electrical motors. I have decided to use 2 electrical winch motors which each have a rating of 5700kg and a drum size of diameter 64mm My question is, how do I calculate the speed of the vehicle if I am planning on using 18" wheels. Do i need to calculate the rotational speed of the drum first? I need this information in order to decide which sized sprockets I am to use. Thanks!