Most designers looking to make a small to medium sized mobile robot quickly discover that there are very few standards in the hobby robot industry, to the point that connecting products together is quite a complex design challenge. This article covers mostly mechanical patterns found in hubs and connectors which are available from a variety of hobby robotics parts manufacturers.
This is a companion discussion topic for the original entry at https://community.robotshop.com/blog/show/hobby-robot-industry-standards-hubs-amp-mounting-patterns