Endurance racing doesn’t dominate global motorsport conversation the way Formula 1 does, but in 2025 it delivered something arguably more impressive: sustained, organic growth across multiple continents and two major rulebooks; indeed, although WEC and IMSA now operate within a broadly shared prototype ecosystem, they’re still distinct products with different audiences, commercial structures, and internal priorities.

Nevertheless, their shared success comes from a phenomenal on-track product, showcasing multi-class action, manufacturer storytelling, and the kind of racing purists swear by. And crucially, unlike some other series, WEC and IMSA genuinely seem to understand what they are and how they appeal to people.

But beneath that success, three separate fault lines began to emerge in 2025. Each one matters not because endurance racing is struggling (it isn’t), but because the future depends on navigating these issues without breaking the momentum the sport has finally built.