Friday’s practice at Sepang was marred by an unexpectedly rough tarmac, with lap times running up to 4.5 seconds slower than Pirelli’s simulation models, leading teams to adjust the balance of their cars and engines for a circuit that has not been run in a decade.
Track Degradation Hits Performance
After the monsoons bypassed the event, the 5.35 km strip’s broken‑up surface emerged as the main culprit. An on‑track survey in the early session, coupled with steady sweeper deployment, highlighted stone lapping that sapped grip and forced tire carry to deteriorate faster than anticipated. Pirelli’s chief engineer Simone Berra acknowledged that the roughness and low grip level produced the 4.5‑second differential, noting that “the tarmac is degrading quite quickly, even during the session.”
Berra cautioned that the degradation would likely worsen during a race – “all the cars running together with high temperatures” could accelerate the breaking apart of the surface – yet he emphasized that punctures were not a priority concern, only a drop in overall grip. “It could even be worse in the race, but it’s manageable,” he added, pointing out that teams had no recent reference data for the track.
Drivers Voice the Dilemma
McLaren’s Oscar Piastri described the surface as “sandpaper,” while Charles Leclerc of Ferrari described the day as “very, very tricky” and “dirty” and warned that conditions would evolve “as a lot from today.” The uneven grip forced drivers to recalibrate their braking points, especially at the high-speed Turn 15 and the technical Turn 1 on the main straight.
Berra discussed the trade‑off teams face between a race‑ready balance and qualifying performance: “If you set cars for the longest stints, you might leave the front tires cooler than optimal for the final lap of a qualifying run.” He cited instances where some teams struggled on Turn 1 in qualifying but then excelled during race stints, suggesting that the lay‑down of the tarmac will influence multi‑lap strategy and overtaking potential on the short, winding circuit.
Strategic Intrigue Ahead of the Return
The combination of higher than expected degradation and early stint inconsistencies could keep teams on their toes throughout the race, creating the opportunity for strategic gambles. With Malaysia standing in for Bahrain this weekend, the same tarmac roughness aligns Sepang’s conditions with the traditional home’s wear, setting the stage for a battle where small differences in tire management could decide the outcome.
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