In the high-stakes world of Formula 1 strategy, few decisions carry as much immediate consequence as tyre choice at the start of a race. At the 2024 Canadian Grand Prix, McLaren made a bold call that went spectacularly wrong, sending both Lando Norris and Oscar Piastri out on intermediate tyres while the vast majority of the grid rolled off on slicks. What followed was a painful lesson in the razor-thin margins that define modern F1 strategy.
A Borderline Call at Circuit Gilles Villeneuve
The morning of race day at Circuit Gilles Villeneuve brought light rain to Montreal, enough to keep teams alert and meteorologists busy. As the hours ticked toward the scheduled 4pm local start, the circuit dried steadily and conditions improved to a point where most engineers were comfortable committing to slick rubber. Not McLaren.
The Woking-based outfit read the situation differently, believing that rain would intensify around the time the lights went out. It was not an irrational thought. Weather in Montreal during the Grand Prix weekend has a well-documented habit of shifting quickly, and the threat of incoming precipitation was real enough to at least consider the intermediate option. But when the race began, the track was dry enough for slicks, and McLaren found themselves immediately disadvantaged.
The Technical Reality of Starting on the Wrong Compound
Intermediate tyres are engineered for light wet conditions, featuring a tread pattern designed to disperse water and maintain grip on a damp surface. On a track that has dried sufficiently for slick rubber, however, they overheat quickly, degrade at an accelerated rate, and simply cannot match the pace of a dry-compound tyre. The performance gap is not marginal. It is immediate and visible.
For Norris and Piastri, the implications were straightforward and damaging. Both drivers were forced into early pit stops to switch to slicks, surrendering track position that is notoriously difficult to recover at a circuit like Montreal, where overtaking opportunities are limited and pit lane strategy often defines the final order. The time lost in those extra laps on intermediates, compounded by the pit stop itself, effectively ended any realistic chance of a strong points haul for either driver.
Stella Defends the Decision
McLaren team principal Andrea Stella was measured but firm in defending the call after the race. He acknowledged the outcome but pushed back against the narrative that it was a reckless or indefensible decision, framing it as a reasonable read of the pre-race conditions and the forecast data available to the team at the time.
That kind of post-race defense is familiar territory in Formula 1. Teams regularly back their strategists even when calls do not come off, partly to maintain internal confidence and partly because the complexity of real-time decision-making under pressure is difficult to fully convey to outside observers. The data may well have supported the intermediate call in the hours before the race. The problem was that the weather did not cooperate.
Championship Points Thrown Away
The timing of the misfire made it all the more frustrating for McLaren. The 2024 season had seen the team emerge as a genuine title contender, with Norris in particular pushing hard to close the gap to the championship leader. Every point matters in that context, and a strategic error that compromises both cars in a single afternoon represents a significant setback.
Mixed-condition tyre decisions have shaped championship outcomes before. The 2021 Turkish Grand Prix, the 2019 German Grand Prix, and numerous other wet-weather races serve as reminders that starting on the wrong compound can unravel an entire race weekend regardless of the underlying pace of the car. McLaren’s 2024 Canadian GP will now take its place alongside those cautionary tales.
The decision also highlighted an area of vulnerability for a team still building out its strategic depth at the front of the grid. Red Bull under Christian Horner and Adrian Newey built a dynasty in part on the reliability of their strategic decision-making under pressure. For McLaren to challenge that dominance sustainably, moments like Montreal need to become exceptions rather than patterns.
Why These Calls Are So Difficult to Get Right
It is worth placing McLaren’s decision in broader context. Starting tyre choice in genuinely borderline conditions is arguably the single most difficult strategic call in Formula 1. Unlike undercut or overcut decisions, which are made with live lap time data in hand, the formation lap tyre choice is based entirely on forecast, feel, and the reads of engineers walking the track in the final minutes before the race.
Teams are divided in these moments for good reason. The consequences of starting on intermediates when the track is dry enough for slicks are severe, as McLaren discovered. But the consequences of starting on slicks when rain arrives at the start can be equally damaging, sending drivers into barriers or triggering safety cars that reset the entire race. There is no safe middle ground, and hindsight makes every wrong call look more avoidable than it truly was.
McLaren left Montreal licking their wounds and pointlessly defending a call that ultimately cost them in the standings. The 2024 Canadian Grand Prix will serve as a sharp reminder that in Formula 1, the fastest car does not always take home the most points. As the season heads deeper into summer, the pressure on McLaren’s strategy team to match their engineers’ work on the car will only grow. How they respond to that pressure may well define whether their championship challenge endures or quietly fades.