Kimi Antonelli has revealed why Mercedes’ latest W17 upgrades have made the car more difficult to drive despite delivering increased aerodynamic downforce and grip. Ahead of the 2026 United States Grand Prix in Austin, the Italian explained that the new package has significantly narrowed the car’s operating window, making it harder for Mercedes to find a set-up capable of unlocking its full potential. The team will also reintroduce an important new front wing that received only limited running during the Singapore Grand Prix weekend.
Mercedes arrives at the Circuit of The Americas determined to recover the competitiveness that made the W17 the benchmark car during the first part of the season. However, the recent Grands Prix in Malaysia and Singapore exposed unexpected difficulties following the introduction of the latest aerodynamic developments. The problem is not that the upgrades have failed to produce additional performance, but rather that the extra potential has become much harder to exploit consistently.
Kimi Antonelli explains why Mercedes W17 upgrades have narrowed the operating window
Data collected by Mercedes engineers confirms that the new components have increased aerodynamic downforce while also improving areas where the previous configuration had limitations. The drawback is a substantially narrower operating window, making it more challenging to identify a set-up that allows the car to perform at its best.
“We saw that the car’s operating window had become narrower,” Kimi Antonelli confirmed. “We didn’t even need to analyse it that much because we had already seen it in Malaysia and Singapore. The team still studied what happened during those two weekends, and we also did some work in the simulator, carrying out comparative tests. After Singapore, I completed a correlation session, trying to reproduce the sensations and behaviour of the car that I had experienced on track.”
These findings help explain the difficulties Mercedes has encountered with its upgraded Formula 1 car. The W17 does not appear to have lost its underlying performance potential, but the latest developments have made the car considerably more complicated to optimise.
That distinction is particularly important at this stage of the season, when every free practice session plays a crucial role in preparing for qualifying and the race. Having greater aerodynamic performance available is of limited benefit if the team cannot consistently place the car within the conditions required to exploit it.
Mercedes finds more downforce and grip but struggles with car balance
Kimi Antonelli believes Mercedes has made progress in understanding why the upgraded W17 has become more difficult to set up. The simulator work carried out after Singapore has provided useful information, although the team must now translate those findings into an effective configuration for Austin.
“We understood a few things,” Kimi Antonelli continued. “Now we have to find a way to make the car work, identifying a window in which we can exploit the package’s potential. From the data, the engineers can see that there is more downforce, more grip and that the car is performing better. There are also improvements in areas where the old package struggled more. The problem is that the operating window has changed completely.”
The challenge therefore lies in making the additional downforce usable across different conditions rather than simply increasing the W17’s peak aerodynamic performance. Mercedes must identify a balance that allows the drivers to exploit the improvements without encountering the handling difficulties experienced during the previous two race weekends.
For Kimi Antonelli, the work is particularly important because the latest aerodynamic package has changed the way the car responds to set-up adjustments. Finding the correct operating window could allow Mercedes to recover the consistency that helped establish its advantage earlier in 2026.
Mercedes brings back crucial W17 front wing upgrade for Austin GP
One of the most important elements of Mercedes’ preparations for the United States Grand Prix will be the return of its new front wing. The component forms part of the team’s latest aerodynamic development package, but Kimi Antonelli revealed that he was able to use it for only two laps during the opening free practice session at Marina Bay.
“This weekend I’ll have the new front wing again,” Kimi Antonelli confirmed. “In Singapore, I only used it for two laps in FP1. It’s an important component because the entire package was developed around that wing. It was a shame that we couldn’t use it in Singapore because of a problem we had, but here in Austin it will be available again.”
The front wing’s return could be particularly significant for Mercedes’ attempts to understand the behaviour of its latest aerodynamic package. If the upgraded W17 was developed around the characteristics of the new component, its absence during much of the Singapore weekend may have made the search for the correct aerodynamic balance even more complicated.
The new wing is not necessarily a complete solution to the team’s handling difficulties, but its availability should allow Mercedes to evaluate the package in a configuration closer to the one originally intended during development.
Austin will therefore provide an important opportunity for Mercedes to determine whether the extra downforce delivered by its latest upgrades can be translated into more consistent on-track performance. The objective is to rediscover the W17’s previous competitiveness while taking advantage of the aerodynamic improvements introduced during the final part of the 2026 Formula 1 season.
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