The secret to the Viper ACR’s incredible lap times is grip. With a huge rear wing and diffuser, large front splitter and four dive planes (if you order the Extreme Aero package), the ACR is pushed into the ground by the type of aerodynamic components usually reserved for an IMSA racecar.
Aero isn’t the only thing helping to stick the Viper ACR to the pavement, though. Dodge partnered with Kumho to develop exclusive tires for the Viper ACR that measure 355mm in the rear, making them tied with the $500,000 Aventador SV for the widest tires currently fitted to a production car. This is according to Road & Track, who recently published a list of the widest rear tires currently fitted to a production car.
The Viper isn’t the only FCA product that appears on the list, either. The F12 TdF’s 315mm rear tires are tied with the McLaren P1 for the tenth widest in the industry, while the LaFerrari’s 345mm rear tires are tied with the Koenigsegg One:1 for second widest.
The Bugatti Veyron currently holds the record for widest-ever tires fitted to a production car at 365mm. We don’t see that record being broken, at least not until the next-generation of the Volkswagen Group hypercar comes along.