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Sebring, FL
Live motorsport conditions at the circuit
Temperature
85F
Humidity
68%
Wind
4 mph
Pressure
1006 hPa
Density altitude
2,319 ft
Track surface
116F
No public description is available for this track.
Elevation (ASL)
130 ft
Precipitation
none
Alerts
0
“Circuits with a very uneven surface are a special case. The car is under great strain, but what is worse is that the suspension and the aerodynamics are unable to follow these sudden changes of level. This makes the driving of sensitive cars very difficult, because the reactions are not the usual ones.”
Ayrton Senna's Principles of Race Driving — Ayrton Senna
Sebring's extreme bumpiness is legendary — the concrete runway patches create violent impacts that unsettle every car. Senna's observation about suspension and aero being "unable to follow sudden changes of level" describes Sebring perfectly. Accept that the car will not respond normally; use softer inputs and build in margin. The driver who stays smooth through the bumps loses less time than the one who fights them.
“In bumpy corners lateral G's vary more than usual as the chassis struggles for grip. Steering corrections, if present, are out of phase with the G graph. After finding bumps, look for signs of oversteer, understeer, or general instability. If the bumps have a detrimental effect on the car, driving or setup changes may be needed.”
Data Power — Buddy Fey
Fey's data analysis reveals why Sebring feels so treacherous: the bumps cause rapid lateral G variations that the driver cannot correct in real time. The steering corrections you make are inherently out of phase with the disturbances. The solution is to accept slightly lower peak cornering speeds and focus on carrying momentum through the bumpy zones with a stable, predictable car rather than chasing maximum grip.
“The current trend is towards soft springs in conjunction with very effective dampers, which allow considerable wheel movement on bumpy surfaces but keep the tyre firmly in contact with the road.”
Racing and Sports Car Chassis Design — Costin & Phipps
Sebring demands exactly the spring-and-damper philosophy Costin and Phipps describe. Stiff springs will launch the car off the concrete transitions; the wheels need freedom to follow the surface. Run softer springs than you would at a smooth track, combined with firm rebound damping to prevent the car from floating. The goal is tire contact, not body control.
Find HPDE organizers, car clubs, and sanctioning bodies that run events at Sebring International Raceway.