Trackium

Putting mecanum rollers on tracks is an interesting idea to say the least. Team 10355 made this render and posted it on one of the FTC discord servers. on first glance you see a drive train with tracks which is a rare enough site on the FTC discord but on closer inspection you see that there are rollers on the tracks.

With this design you get all the good parts of mecanum wheels and of using tank tracks just with some reduced capabilities. You get the maneuverability of mecanum wheels but also the grip of tracks with this setup in theory how well it does in practice remains to be seen.

Issues that arise when you use tracks like this are things like how the spacing needs to be different in order to reach similar vectors to wheels. Another issue is with rollers on the tracks that makes suspension located on the idlers very difficult but you can mount the suspension in a different way to achieve the same result but that reduces the grip of the tracks but the grip is still better.

The structure of the drive train in this picture is sub optimal for going over rough terrain due to the low clearance.