Despite their modest weight, the torsional rigidity and flexural strength of the 911 Carrera GTS Cabriolet models are exemplary. Body flexing is minimal even on the most poorly surfaced roads. Additional brace members at each of the rear wheel arches provide additional reinforcement to the bodyshell. Increased protection is provided by an automatically deploying roll-over protection system if the car were to overturn. Two spring-loaded roll-over bars are neatly incorporated behind the rear seats. The roll-over sensor continuously monitors the car’s pitch and roll, contact with the road, as well as lateral and longitudinal forces. If the car were to overturn, the roll-over bars would be deployed instantly.