My group is looking for types of chassis to use for our robot. We are mostly considering using tank chassis, but it would be helpful to have more ideas for what we should use.
The best chassis for most teams is using Omni wheels. This design provides a lot of grip while also being able to maneuver easily. Depending on how many motors you use, the gearing, and how many wheels you use, it should be pretty simple to build.
There are many Omni wheel designs you can find online for inspiration.