If you think suspension in a car exists solely to smoothly drive over bumps and potholes, forget it. In Formula 1, suspension is a servant to aerodynamics.
A modern ground-effect car is sucked down to the road with a force of several tons. If the suspension is too soft, the car will simply slam its floor onto the asphalt and block the airflow. If it is too stiff, the car will bounce over the very first bump and lose downforce.
Let's break down how this magic works and what the difference is between push-rods and pull-rods.
1. The Main Goal of F1 Suspension: Maintaining Ride Height
The ride height (ground clearance) of an F1 car is literally a couple of centimeters off the asphalt.
Underneath the floor are Venturi tunnels that suck the car to the track. These channels work perfectly only if the distance from the floor to the road remains absolutely stable:
• Under braking (when the nose dives down).
• Under acceleration (when the rear end squats).
• At high speed (when aerodynamic downforce presses on the car with a force of 2-3 tons, attempting to squash it into the ground).
The primary goal for engineers when setup-tuning suspension is to prevent the body from moving up and down so that the airflow beneath the floor does not go crazy.
2. Anatomy: Push-rod vs. Pull-rod
Inside an F1 wheel, you won't find conventional springs and MacPherson struts. All dampers, springs, and torsion bars are hidden inside the nose cone or gearbox casing. So how do you transfer the movement of the wheel to the damper inside the chassis? One of two layouts is used: Push-rod or Pull-rod.
1. Push-rod
• How it works: A diagonal rod extends from the bottom of the wheel UPWARD to the car's body.
• Physics: When the wheel hits a bump and travels up, the rod PUSHES an internal rocker, which compresses the damper.
Pros:
• Suspension mechanisms are located high up in the nose — mechanics find them incredibly convenient to access for setup adjustments.
• Frees up space underneath the nose cone for clean airflow.
Cons:
• Shifts internal mechanisms (springs, rockers) slightly higher, raising the center of gravity.
2. Pull-rod
• How it works: A diagonal rod extends from the top of the wheel DOWNWARD to the very bottom of the car's body.
• Physics: When the wheel travels up, the rod PULLS an internal lever downward, compressing the damper.
Pros:
• All heavy internal components (dampers, rockers) are lowered to the absolute bottom of the car. This significantly lowers the center of gravity (CoG)!
Минусы:
• Absolute nightmare for mechanics: to access the suspension, they literally have to remove floor sections and work upside down.
• The diagonal rod disrupts airflow around the upper section of the nose/sidepods if aerodynamic channeling isn't handled perfectly.
3. The Eternal War: What to Choose for the Front and Rear?
F1 designers constantly combine these systems. For instance, Red Bull successfully ran a Pull-rod at the front and a Push-rod at the rear in recent years, while Ferrari or Mercedes did the opposite.Why isn't there a single "ideal" solution?
1. Front section:
• Choosing a front Pull-rod lets engineers drop weight as low as possible. However, the rod sits at a sharp angle to the airflow and must be integrated flawlessly into aerodynamics.
• Choosing a front Push-rod makes it easier to direct clean air under the floor toward the Venturi tunnels, though the center of gravity will be slightly higher.
2. Rear section:
• Rear suspension attaches to the gearbox housing. How air exits toward the diffuser and rear wing is of massive importance here.
• Using a rear Push-rod frees up the narrow "coke bottle" region at the bottom of the diffuser, allowing more airflow to pass through.
4. Anti-dive & Anti-squat
Modern F1 suspension wishbones (typically carbon fiber double wishbones) are not mounted parallel to the ground, but at specific angles.
• Anti-dive: Under heavy braking from 350 km/h, inertia tries to force the car's nose downward. The front suspension wishbone geometry is engineered to mechanically resist this diving motion. The nose stays level, the floor doesn't scrape the asphalt, and aerodynamic balance doesn't shift backward.
• Anti-squat: Mashing the throttle transfers a ton of weight to the rear axle. Rear suspension geometry prevents the rear end from squatting deeply, keeping the proper angle of attack for the diffuser.
Summary: Key Takeaways on F1 Suspension
1. Servant to aerodynamics: Suspension isn't built for comfort, but to rigidly maintain stable ride height.
2. Push-rod: The rod goes from bottom to top, pushing the damper. Higher center of gravity, but easier access and cleaner air under the nose.
3. Pull-rod: The rod goes from top to bottom, pulling the damper. Perfectly lowers center of gravity, but harder to service.
4. Wishbones as wings: Every rod and wishbone features a teardrop carbon fiber profile to direct airflow exactly where aerodynamicists need it.