Rear Axles (outboard of the contact surface with the wheel spacer), nuts & retention system

In Simple Terms

This regulation controls the design of the rear axle components that stick out beyond the wheel spacer, including the wheel nuts and the safety mechanism that prevents the nut from coming loose during a race. Teams must use an approved dual-stage retention system to ensure the wheel nut stays secure.

• Covers the outer portion of the rear axle extending beyond the wheel spacer contact point
• Requires a dual-stage mechanism to retain the wheel nut if it becomes loose
• Specifies design requirements for axle geometry, fasteners, and the nut retention system
• Ensures safety by preventing wheel detachment during competition