Michelin has unveiled its next-generation racing tyres for the IMSA WeatherTech SportsCar Championship, featuring 50% renewable and recycled materials while promising enhanced performance characteristics.
The new MICHELIN Pilot Sport Endurance 2026 range forms part of Michelin's broader "All-Sustainable" strategy, which targets 100% renewable and recycled materials across all tyre production by 2050, with an intermediate goal of 40% by 2030. Currently, sustainable materials account for 31% of Michelin's total material purchases.
"It would be tempting, faced with the technical and sporting success we enjoy with our current range, to choose stability. But it is precisely when everything works that you need to dare to go further," explains Matthieu Bonardel, Director of Michelin Motorsport. "Our responsibility is to prove that technological excellence and environmental responsibility can advance together."
Technical Composition and Materials
The 50% sustainable content comprises both renewable and recycled materials across all major tyre components:
Renewable materials:
- Natural rubber latex
- Bio-sourced oils
- Bio-sourced resins
Recycled materials:
- Recovered carbon black from end-of-life tyres
- Recycled steel reinforcement
This material composition addresses all primary tyre components: synthetic rubber (25%), natural rubber (24%), fillers including carbon black and silica (20%), steel (10%), additives (14%), and textiles (7%).
Performance Enhancements
Contrary to assumptions that sustainability might compromise performance, Michelin reports the new tyres deliver several competitive advantages:
- Improved warm-up characteristics: Faster temperature build-up for optimal performance windows
- Enhanced longevity: Extended stint capabilities without performance degradation
- Greater consistency: More predictable behaviour throughout tyre life
- Distinctive visual appearance: New sidewall design for improved visibility
These improvements build upon an already successful platform, with IMSA Hypercar prototypes gaining approximately one second per lap annually through optimized tyre usage.
Development Through Simulation
The development process relied heavily on virtual testing using Michelin's TAMETIRE software and finite element analysis. This approach significantly reduced the environmental impact of research and development by minimizing physical prototype production and track testing.
Philippe Tramond, Technical Director of Michelin Motorsport, notes: "Simulation is the starting point of a complete reinvention." The integration of virtual driver models allows full multi-hour stint simulations, assessing tyre consistency and generating optimized racing lines before any physical prototypes are manufactured.
Allocation Reduction Strategy
The improved tyre longevity enables substantial allocation reductions. From 2023's DPi era to current GTP regulations, seasonal tyre allocation has decreased by 30%. Michelin projects potential further reductions of 15-30% from 2027, assuming robust double-stint capability is demonstrated during 2026 competition.
Technology Transfer to Production Tyres
While the immediate focus remains on racing applications producing approximately 10,000 tyres annually for IMSA's top classes, the technologies and methodologies developed will transfer to Michelin's production tyre range. This includes simulation tools, sustainable material sourcing, and manufacturing processes that can scale across the company's annual production of nearly 200 million tyres.
The integration of sustainable materials is guided by comprehensive Life Cycle Assessment (LCA) methodology, conforming to ISO 14040-44 standards, ensuring that improvements in one area don't create negative impacts elsewhere in the production chain.