The front suspension is a McPherson suspension strut design, while the rear suspension is a multi-link live axle design utilizing trailing arms. Brake discs must be made of steel and may not exceed diameter. The only aerodynamic components on the vehicles are the front splitter, rear wing, solid polycarbonate glass window in the windows only, and side skirts. The use of rear diffusers, vortex generators, canards, wheel well vents, hood vents, and undertrays is strictly prohibited. While the cars may reach speeds of about on certain tracks.