Tire Pace Curves
How lap times evolve across a stint as tires degrade — the shape of strategy.
Tire pace curves are the visual fingerprint of race strategy. By plotting lap times across a stint, you can see exactly how tires degrade — gradually losing a tenth per lap, or holding steady before a sudden cliff. These curves are how Sportami's analysis reveals the strategic story: which driver managed tires better, which compound choice was correct, and when the pit stop should have happened. Reading pace curves transforms you from watching a position board to understanding the forces that drive position changes.
How lap times evolve across a stint as tires degrade — the shape of strategy
Key Ideas
The Shape Tells the Story
A flat curve means the driver is managing tires beautifully — barely degrading. An upward slope shows steady degradation. A curve that suddenly steepens is a cliff. Each shape has strategic implications for when to pit and how the rest of the race will unfold.
Compound Comparison
Overlaying pace curves from different compounds reveals the core strategy tradeoff. Soft tires start faster but the curve rises steeply. Hard tires start slower but the curve stays flat. The crossover point — where the hard becomes faster than the degrading soft — defines the optimal pit window.
Fuel-Corrected Pace
Raw lap times include the effect of fuel burn — cars get lighter and faster by about 0.06 seconds per lap as fuel burns off. Fuel-corrected pace removes this effect, showing pure tire performance. Without fuel correction, degradation looks less severe than it actually is.
Traffic and Clean Air Effects
Pace curves can be noisy — a slow lap might be caused by traffic, not tire degradation. Analysts filter out laps affected by battles, blue flags, or safety car restarts to see the true underlying degradation trend.
Cliff Prediction
When a pace curve starts to steepen — degradation accelerating from 0.1 to 0.2 to 0.4 seconds per lap — a cliff is approaching. Teams watching this trend will trigger a pit stop before the cliff hits, avoiding the catastrophic multi-second lap time loss.
How It Works
A flat curve means the driver is managing tires beautifully — barely degrading. An upward slope shows steady degradation. A curve that suddenly steepens is a cliff. Each shape has strategic implications for when to pit and how the rest of the race will unfold.
Overlaying pace curves from different compounds reveals the core strategy tradeoff. Soft tires start faster but the curve rises steeply. Hard tires start slower but the curve stays flat. The crossover point — where the hard becomes faster than the degrading soft — defines the optimal pit window.
Raw lap times include the effect of fuel burn — cars get lighter and faster by about 0.06 seconds per lap as fuel burns off. Fuel-corrected pace removes this effect, showing pure tire performance. Without fuel correction, degradation looks less severe than it actually is.
Pace curves can be noisy — a slow lap might be caused by traffic, not tire degradation. Analysts filter out laps affected by battles, blue flags, or safety car restarts to see the true underlying degradation trend.
When a pace curve starts to steepen — degradation accelerating from 0.1 to 0.2 to 0.4 seconds per lap — a cliff is approaching. Teams watching this trend will trigger a pit stop before the cliff hits, avoiding the catastrophic multi-second lap time loss.
See the Why
On Sportami's race analysis charts, look at the stint pace plots. A driver whose curve stays flat deep into a stint has excellent tire management. If two drivers' curves diverge — one flat, one rising — the flat-curve driver has a strategic advantage: they can pit later, extending their window and potentially gaining position.
Real-World Examples
Flat Curve — Strategic Advantage
A driver's pace curve on medium tires shows almost no degradation for 30 laps — losing only 0.05 seconds per lap. This allows a one-stop strategy that rivals on softs can't match. The tire preservation earns 20 seconds by avoiding an extra pit stop.
Cliff Warning — Emergency Pit
A driver's pace curve shows steady 0.1 seconds per lap degradation for 20 laps, then suddenly 0.3, then 0.5. The team recognizes the cliff pattern and pits immediately. The next lap on old tires would have lost 2+ seconds — the early recognition saved the position.
Compound Crossover
At the start of a stint, a driver on softs is 0.8 seconds faster than a rival on hards. By lap 12, they're equal. By lap 15, the hard-tire driver is faster. The pace curves crossed over — from this point, every lap on softs costs time, making the hard-tire strategy increasingly advantageous.
Quick Check
What does a tire pace curve that suddenly steepens indicate?
Reveal answer
A pace curve that steepens shows degradation accelerating — each lap is slower by an increasing amount. This pattern warns of an imminent tire cliff, where performance drops dramatically. Teams use this signal to trigger pit stops before catastrophic grip loss.