Are mecanum wheels legal in gateway ?
Is there any reason they would not be?
They are part of the VEX Robotics Design System product line, yes? And thus, under <R5>, they are explicitly legal, yes?
I would usually point you to the official game question thread, but this has already been answered by Karthik (a search will find the exact thread).
I find no room for disagreement here.
I imagined ther probably were legal but better to be on the safe side.
A quick forum search for “Mecanum legal” would have answered your question