Of course. No rule says they must, only that they be LEGO pieces.
Is it okay if lego wheels on the robot donot have rubber tires?
To UNSUBSCRIBE or CHANGE your settings, please visit
https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list".
VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. Visit https://listserv.jmu.edu/archives/vadcfll-admin-l.html to subscribe.