Mercedes uncovers culprit of odd W17 balance issues in Brazil

Mercedes has shed light on the baffling handling problems that turned Kimi Antonelli’s Sao Paulo Grand Prix into a frustrating exercise in damage limitation, with team-mate George Russell also caught out by the Silver Arrows’ unpredictable behaviour.

The Brackley outfit had arrived at Interlagos with high hopes after Antonelli secured his maiden world championship in Mexico. And for a while, the newly crowned champion looked perfectly capable of celebrating in style, having capitalised on Lando Norris’ sluggish getaway to seize the early lead.

But what initially looked like a promising afternoon unravelled once Mercedes switched to slick tyres, exposing a peculiar balance problem that left both drivers struggling to keep their W17s under control.

Mercedes deputy team principal Bradley Lord has now explained what went wrong, pointing to tyre temperatures and the particularly tricky conditions as the main culprits rather than an underlying mechanical failure.

A tyre temperature puzzle catches Mercedes out

Antonelli's difficulties became apparent almost immediately after his switch to soft tyres on lap 18. The Italian began complaining about strange sensations from the car, reporting what felt like a suspension problem and an unsettling tendency for the W17 to pull to one side.

His concerns proved justified when the rear suddenly stepped out under braking into Turn 1 two laps later, sending him spinning into the run-off. Having already suffered an earlier excursion at Turn 12, Antonelli was left fighting to salvage what he could from an afternoon that had promised considerably more.

Russell wasn't immune either, narrowly escaping a spin at the pit exit as Mercedes' handling woes affected both sides of the garage.

According to Lord, the team's subsequent investigation pointed towards an inability to maintain the tyres within their ideal operating range, particularly during the soft-tyre phase.

"Kimi obviously had had a spin, flat-spotted all four tyres and so his pace was somewhat limited," Lord explained in Mercedes' video debrief.

"We did really struggle as we went onto that dry soft tyre and then in the final inter-stint as well, with a car that was very, very tricky to drive, very oversteery and in the soft tyre stint in particular, with very low tyre temperatures."

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The problem was not exclusive to Mercedes, either. The cooler, damp conditions made it difficult to generate sufficient heat, producing an inconsistent level of grip that could catch drivers by surprise.

"That meant both of the drivers, and indeed other drivers in the field, actually thought there was something broken with the car;’” Lord added.

“But looking at it, it looked like we were just below the tyre temperature window, sometimes popping into it, but then dropping back out of it in the damp conditions, and that's what was causing the very strange and unusual car behaviour."

A chaotic afternoon with an unexpected consolation

For Antonelli, the explanation will do little to soften the disappointment of surrendering a potential victory. His spin cost him valuable time and track position, leaving him fifth at the chequered flag, 41 seconds behind race winner Norris.

Russell fared marginally better, recovering to fourth, but neither driver was able to extract the W17's full potential consistently.

Lord nevertheless found reasons to take some satisfaction from an afternoon that repeatedly threatened to descend into complete disorder.

"It was a really topsy-turvy race. It's not very often that you spin off on a formation lap and almost make contact with a barrier, that you spin in the pitlane with the other car, that you have several incidents on track as well and nonetheless manage to come home fourth and fifth."

There was also a reminder that Mercedes' underlying pace had not disappeared. Indeed, despite the handling difficulties, the team had enjoyed some particularly competitive spells.

"There were periods of the race in Brazil, the first inter tyre at the start and then during a large part of that dry soft-tyre stint, that we actually were the fastest car on track,” Lord concluded.

The W17 had the speed to challenge at the front, but its inconsistent behaviour on slicks prevented Antonelli and Russell from converting that potential into a much stronger result.

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