Sepang 2026 · Race-week update
Sepang's Sandpaper Surface: Why Tyre Degradation Is the Weekend's Big Unknown
By Will Tygart · October 2, 2026 · Filed ~11:30pm MYT Oct 2, kept current through race weekend
The direct answer
Pirelli's final track-surface analysis ahead of the Malaysian weekend shows Sepang's roughness has increased since F1's last visit in 2017 — and with Sakhir off the calendar, Sepang is now the roughest circuit of the 2026 season, ahead of Barcelona. There is a certain irony in that: the Bahrain Grand Prix in Malaysia has inherited the roughest-surface crown from the Bahrain Grand Prix in Bahrain.
What that means for Sunday: two or three pit stops are looking likely, per the drivers after Thursday's track walks — a completely different race from the flat-out, near-zero-degradation one-stoppers of Monza, Spain and Azerbaijan. High degradation opens strategy up, and open strategy is what makes races interesting. Nobody is sure yet; Friday's running decides.
Pirelli has been aggressive with its compound choice for exactly this reason: the C2 Hard, C3 Medium and C4 Soft — a step softer than a conservative pick for a track this abrasive.
Why Sepang eats tyres
More roughness means less grip, more sliding, and more overheating — and wear rates climb too. Sepang's surface is weathered: in the bumpy sections, the upper layer of stones has worn away. Sections resurfaced in 2023, like between Turns 7 and 12, are in reasonable shape. The original asphalt, especially into the first sequence of corners, is very rough.
The bumps add a second problem. Vertical loads from undulations stress the tyres on top of the sliding — a phenomenon seen before at Austin's Circuit of The Americas. Work was done ahead of the weekend to flatten the worst undulations, but drivers still found bumpy sections on their track walks.
Then add the heat. The FIA has already declared a Heat Hazard for this race, and championship leader Kimi Antonelli put the two factors together after his track walk: "It's the roughest track tarmac that I've seen. Probably it's similar to Bahrain in some places, maybe even more. So it might be a scenario where we see two, three stops in the race, also because it's so hot."
Oscar Piastri's verdict after his first look: "It looks like sandpaper out there. I definitely think it's going to be challenging with tyre deg."
What the drivers say
The paddock is split between wary and delighted — and the delighted camp has a point. Carlos Sainz smiled when the topic came up: "Good. Maybe finally we see some deg, because it's been a few weekends now in a row where there's been zero deg and it makes the racing a bit less driver-dependent; it's just about pushing flat out and the car you have. You cannot manipulate the strategy or anything, so I wouldn't mind seeing a bit of deg."
His rule of thumb for a good race: "I've always said the best races in Formula 1 have been the races where there is a bit of deg and it's always between a one and a two-stop strategy. When there is no strategy flexibility, always the show takes a hit."
The most similar recent comparison, per the paddock, is Barcelona — which turned into a strategy thriller. That's the template for what Sunday could be.
George Russell flagged the qualifying implication: "You'll be overheating the tyres even on the outlap of a qualifying session, which may make it more challenging to follow closer and to re-attack [in the race] once you've been overtaken. But that's the total unknown currently." Keeping tyres alive may be a challenge even over one lap — some drivers suggested it on Thursday.
Antonelli added a practice warning: with limited laps available and quali simulations punishing the rubber, "it's going to be important to be on top of it straight away."
What it means for Sunday
Strategy variety rewards the teams and drivers who manage degradation best — through car setup, driving style, and pit-wall calls. In a flat-out one-stopper, the fastest car wins. In a two-or-three-stop race with a sliding window, the best tyre managers can beat faster cars. That's the opportunity midfield teams will be eyeing.
It also changes what you're watching. Instead of tracking a single pit window, watch the undercut and overcut attempts, watch who extends a stint when others pit, and watch the final 15 laps — that's where a two-stopper on fresh rubber hunts down a one-stopper on worn tyres, if anyone dares the one-stop at all.
One honest caveat: all of this is Thursday prediction. The teams will know far more after Friday's long runs. If the degradation is milder than feared, the race compresses back toward fewer stops. Check back after FP2.
What to watch in Friday practice
FP1 runs 12:30–1:30pm MYT, FP2 4:00–5:00pm MYT on Friday. Here's the tyre-watch checklist:
1. Long-run pace, not headline times. The interesting number isn't the fastest lap — it's how quickly lap times fall off over 8–12 lap stints. Big drop-offs confirm the deg story; stable times suggest Thursday's fears were overstated.
2. Graining and blistering. Watch for drivers radioing about vibrations or visible graining on the onboard shots. That's the surface talking.
3. Who looks after the rubber. Note which teams can run longer stints without the times collapsing — that's your shortlist for Sunday's strategy plays.
4. Qualifying simulations. Russell's outlap-overheating warning means even single-lap pace may be tyre-limited. If drivers are struggling to get a clean lap in, qualifying itself becomes a lottery.
5. The weather window. MetMalaysia has a severe-weather warning for heavy rain and thunderstorms through 5pm Friday — squarely over FP2. A wet FP2 would rob teams of exactly the long-run data they need most. The weather guide has the full weekend forecast picture.
The rain wrinkle
Rain is likely at some stage this weekend — Wednesday's deluge gave the paddock an early taste. Here's the twist: Sepang's rough, open surface actually drains water well. Antonelli: "Because the surface is so open, there's actually not a lot of standing water, unless it pours down... it actually goes in-between the stones — so it makes less risk of aquaplaning." His verdict: this could be the best track to try the 2026 cars in the wet for the first time.
The catch: the wet-weather tyres themselves. Sainz, citing drivers who have run them: "From what I heard, this year's wet tyre and inter tyre is quite a difficult tyre." Add the 2026 power units — downshifts, harvesting, corner-to-corner power variability — and a wet session becomes a genuine test. Lando Norris: "I've not driven in the wet in this car, so it is still a completely new experience for us."
For fans: a wet session wouldn't ruin the weekend — at Sepang it's usually a classic. Just bring the poncho either way.
Quick answers
How many pit stops will the Sepang race have?
Nobody knows yet — that's the story. After Thursday's track walks, drivers put two or three stops on the table, versus the flat-out one-stoppers of recent races. Friday's long-run data decides; check back after FP2.
Why is Sepang's surface so rough?
It's weathered: the upper layer of stones has worn away on the original asphalt, especially into the first corner sequence, and roughness has increased since F1's last visit in 2017. Sections resurfaced in 2023 (Turns 7–12) are in better shape. Pirelli's analysis now rates it the roughest track of the 2026 season.
Which tyres did Pirelli bring to Sepang?
The C2 Hard, C3 Medium and C4 Soft — an aggressive selection for an abrasive track, chosen because high degradation is expected.
What should I watch in Friday practice?
Long-run pace degradation over 8–12 lap stints (not headline times), graining on the onboard shots, which teams manage their rubber best, and whether qualifying simulations look tyre-limited. FP1 is 12:30pm, FP2 4:00pm MYT — though FP2 has a real rain threat.
Could rain change the tyre picture?
Yes, in both directions. Sepang's open surface drains well, so standing water is less of a risk than elsewhere — but the 2026 wet and intermediate tyres are reportedly difficult, and most drivers haven't run the 2026 cars in the wet at all. A wet FP2 would also cost teams the dry long-run data they need.
Sources and timestamps: The Race — 'The major unknown as F1 braces for sandpaper rough Sepang track' (Oct 1, 2026): Piastri sandpaper quote, Pirelli surface analysis, C2/C3/C4 selection, three-stopper prospect, Barcelona comparison. Formula1.com — 'Drivers reflect on the key challenge they expect in Sepang' (Oct 1, 2026): Sainz, Antonelli, Russell, Norris quotes; rain likelihood; wet-tyre difficulty. MetMalaysia severe-weather warning (2:20pm Oct 2) via the night desk. FP1/FP2 times per the official schedule.
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