Is there a specific rule on how many wheels the robot is allowed to have (max and min)? I ask this as our team is developing an idea similar to a hover cart with two wheels that will be used for steering. This would help with getting through many of the obstacles, but we didn’t want to go further if it is against the rules. We haven’t found a rule against it yet!
No limit on number of wheels. There is a limit on the number of motors.
You can find the limits to the number of motors in the game manual section 4.8. It is R29 and it lists the legal motors and the max amounts.