Tsunoda and the RB21: The Paradox of Red Bull's Second Seat

Late in the 2026 season, after the Abu Dhabi round, Yuki Tsunoda said something I had to rewind a few times to be sure I heard correctly: "Even after Abu Dhabi, I didn't know what kind of car I was driving." A driver once rated the most adaptable in the midfield, who had quickly acclimatised to understeer-prone cars at Racing Bulls, closed his first season at a championship-winning team unable to describe the machine beneath him. The results were not ambiguous: 30 points against Max Verstappen's 385. One teammate defeat in 27 qualifying sessions. No podium, best finish sixth in Baku. Ten Q1 eliminations, nine Q2 eliminations, only eight Q3 appearances. And by the end of the year, he had lost his seat.

When a driver cannot describe the car he drives for an entire season, the problem has moved beyond skill. It becomes a question about the interface between human and machine, and about how a team designs a car around a single driver. I spent most of the winter reconstructing this chain of facts, because it touches something I have always believed: every title is the product of a system, and every system has its own grey area.

CONTEXT: A SEAT NOT BUILT FOR THE MANY

Based on my experience following the races through 2026, I logged every qualifying session, every published set-up change, and every driver statement after each round. Red Bull entered the season as reigning champions, but the RB21 revealed an early characteristic that caught my attention: it was only genuinely fast within a very narrow set-up band. Verstappen won eight rounds, more than any driver, yet the championship went to McLaren's Lando Norris. The team with the most wins did not win the title. The answer lay in the second car.

The second seat at Red Bull had become a long story. Sergio Perez was released after a slump. Liam Lawson was promoted, ran exactly two rounds, suffered two Q1 exits, scored nothing, and was pushed back to Racing Bulls. Tsunoda was called up in his place. By year's end, he too was gone. Three drivers, one seat, one cycle. This was no longer an isolated event. It was a pattern recurring often enough that I had to treat it as a system characteristic rather than an individual incident.

Notably, Tsunoda did not arrive at Red Bull as an undervalued driver. Based on his Racing Bulls record, he ranked among the higher-value midfield drivers, selected for "versatility" and "adaptability potential". Two seasons earlier, he was known for handling understeer-prone cars and adapting quickly to difficult configurations. That very versatility was why the scouting department believed he suited the seat alongside Verstappen. The selection criterion was sound on paper. On track, it collapsed almost immediately. Every new race seat is a hypothesis, and the race is the only trial with the authority to rule on it.

THE NARROW OPERATING WINDOW AND THE SET-UP TRAP

The most important technical anchor in this whole story comes from Tsunoda himself. He called replicating Verstappen's set-up his "biggest mistake last year". The admission sounds simple, but beneath it is a very specific operating mechanism. When Tsunoda suffered oversteer, he tried Verstappen's set-up, and the condition worsened. When he suffered understeer, Verstappen's set-up pushed the car into deeper understeer.

This is a non-linear model — and it is the technical crux of the season. Under normal conditions, a stronger teammate's set-up is treated as a referable baseline. But with the RB21, Verstappen's set-up was not a universal baseline. It was a driver-specific optimum, tuned around the extreme feel and corner-entry style of a multiple champion. Applying one driver's private optimum to a differently calibrated driver inverts the car's expected response.

Alex Albon, who occupied this very seat in 2026-20, offered a highly valuable technical description. He said the car's sensitivity was "completely to the max", making it "dart across the screen" when changing direction, "makes you a little bit tense". He described the front end as needing to be "eye-wateringly sharp". That is the signature of a peaky car with a very high peak and a very narrow usable band. Such a car rewards generously anyone who uses it correctly and punishes without mercy anyone who drifts off the optimum.

Tsunoda disputed the Albon comparison, saying "the car is a lot different" — technically fair, since the RB21 belongs to a newer regulation cycle. But the more telling signal is not whether the two cars are alike. It is that the same failure mode recurred across two drivers from different generations. The recurrence of an identical breakdown mode is far stronger evidence than any comparison of specific parameters between two cars.

A CAR OPTIMISED AROUND ONE INDIVIDUAL

The RB21 was described as highly sensitive in direction change — when a driver flips the wheel side to side through S-bends or chicanes. This kind of sensitivity is not a design flaw. It is a philosophical choice. Red Bull built a platform demanding an extremely sharp front end, instant turn-in response, and high tolerance for a "loose" rear. For Verstappen, who can correct beyond normal limits and prefers aggressive rotation on entry, this is an ideal environment. For a driver who needs a more stable rear to build confidence, it is a hostile one.

In my notes, I flagged two possibilities with medium confidence. First, the RB21 likely had a front end that rotated very aggressively on entry and demanded high-tolerance correction, rewarding a driver willing to accept an unsettled rear. Second, this very narrow window amplified the cost of any small set-up error, making Tsunoda's early qualifying exits cluster rather than scatter. A peaky car punishes small errors disproportionately in a single timed lap.

The quantitative record confirms this. An average deficit of 0.6 seconds per qualifying lap against Verstappen. One teammate victory across 27 sessions. Ten Q1 eliminations. For a driver chosen for adaptability, these numbers are no longer a sign of a pure ability gap. They signal a structural mismatch between driving style and the car's operating window.

A TWO-WAY LOSS OF A DATA CHANNEL

What caught my attention most in this whole story was not the points gap, but the engineering feedback. A driver who cannot describe the car he drives cannot provide directional feedback for development. Over a full season, this is a two-way loss: the driver cannot adapt, and the team loses a data channel.

Tsunoda admitted he had "big enough ego to not change my driving style", and that he "tends to force the car how I want to drive". Combine the two admissions and the picture is clear: a driver resistant to changing his style met a car that did not accept that style. Neither side adapted. This is the classic competitive deadlock — where each waits for the other to yield, and both lose.

From a car-development perspective, the consequence is even more serious. With only one reliable feedback channel from Verstappen, all development data passes through a single sensory filter. The more optimised the car becomes around that filter, the narrower the window gets, and the harder the second seat becomes to fill. This is a self-reinforcing loop, and it explains why the problem does not fade season over season.

AGAINST THE HISTORICAL BENCHMARK

The comparison with Felipe Massa's 2026 season is often used as precedent. I consider that comparison incomplete. Massa's slump reached a trough of 17th eight rounds in, and he partially recovered later. Tsunoda's case differs in kind: the collapse lasted all season and ended with the loss of a seat, with no sign of recovery. At a team contending for the championship, this level of deficit ranks among the most severe ever recorded.

The ratio of 30 to 385 points is roughly 7.2 per cent of a teammate's output. In a season where the title was decided by consistency and second-car contribution rather than peak speed, that contribution was close to zero. Red Bull won the most rounds but lost the championship. The gap lay precisely in that second points column.

A COUNTER-INTUITIVE ANGLE: THE CAR OR THE EGO?

The default story — "the RB21 was a car only Verstappen could exploit" — is plausible and evidence-backed, both from the recurrence in Albon and from the lead driver's dominance. But the ego admission opens a considered alternative reading: the failure lay primarily in a fixed mindset, not the car. Both hypotheses are compatible with the same dataset, and the truth is likely a mix of both.

Here I must challenge my own model. If the problem lay entirely in the RB21's narrow window, a driver closer to Verstappen's style would solve it. If it lay in a fixed mindset, that driver would repeat the failure at any top seat. The axis that separates the two hypotheses does not lie within the 2026 season. It lies in the next seat, and in how the media system receives this story.

One thing I am certain of: the recurrence of the same failure mode across three different drivers — Perez, Lawson, Tsunoda — within a single cycle turns the second seat into a structural disadvantage, not an individual incident. Promoting Lawson into a race seat after just two rounds, only to withdraw him, was a costly evaluation error — the team used a race seat as a test bed, and both driver and team paid.

THE LESSON FOR WHOEVER COMES NEXT

What will be worth watching in the next cycle is not who takes the seat, but whether Red Bull widens the operating window of the RB21's successor. If the balance philosophy does not change, the second seat will remain a quantifiable handicap rather than a fixable anomaly. If the 2026 regulation cycle changes the fundamental aerodynamic character, the whole problem may dissolve on its own.

Tsunoda is now off the grid, with his failure story as the primary data about him. His return depends on whether a midfield team is willing to bet that the RB21 was the outlier rather than him. Meanwhile, the system has shown what it always shows: the grey area is not where the light is lacking. It is where the race is most real — where a car is born to serve one man, and the price is paid by everyone else.