There would be no penalty.

"3.2.5.2 G23
A ROBOT’S horizontal dimensions may never exceed a 54 in. diameter vertical cylinder.
Violation: FOUL. If continuous or repeated violations, TECHNICAL FOUL.
In other words, a ROBOT must always fit inside a cylinder with a diameter of 54 in. This method for restricting ROBOT size requires extra diligence if a ROBOT’S geometric center shifts as various appendages are extended and retracted."