Michelin takes a step forward to reduce particle emissions

Michelin has just presented the fruits of his research. The French, with the purpose of reducing tire abrasion and deepening the knowledge of this area, have devised a new particle analysis system known as sample.

This system, presented at the Tire Technology Expo 2024, allows the capture, classification, counting and evaluation of particles emitted in the vicinity of tires, with unprecedented precision and reproducibility. sample represents a significant advance towards the creation of tires whose wear particles are completely assimilable by nature.

Numerous questions remain regarding tire wear particles and their interaction with roads. It is therefore vital to rely on reliable, reproducible and standardized measurements. This analysis system will facilitate a deeper understanding of the environmental impact of these wear particles, with the aim of designing new solutions.

Tire wear particles are, on average, the size of a human hair (100 µm) and make up a complex mixture composed of equal parts rubber (50%), minerals and other road elements (50%).


This is the Michelin study

The study of Michelin has allowed a better quantification of the number of particles that contribute to atmospheric pollution, that is, PM10 and PM2.5. To date, these figures have never been verified with such precise experimental measurements. The first results indicate that, on average, 1.3% of the particles emitted by a tire correspond to PM10, while 0.16% correspond to PM2.5. The latter being susceptible to being suspended in the air.

This precise quantification is crucial not only for Michelin in their effort to better understand the interactions between tires, roads and driving styles, but also for government agencies responsible for assessing pollution in cities. These data are essential for the design of simulation models that measure air quality.


Michelin has made this analysis system available to both the tire industry and the European Tire and Rubber Manufacturers Association (ETRMA). The latter will carry out a larger-scale measurement campaign with the collaboration of an independent body starting in 2024, with an estimated duration of 18 months.

The approach of Michelin complements the regulations Euro7, recently adopted by the European Commission. This regulation will establish regulatory limits for tire abrasion to reduce particle emissions in Europe. Based on its own testing method, it will allow the quantification of all tire and road wear particles in grams per kilometer and ton transported, facilitating the measurement of large-scale emissions for all tires on the market. Those that do not comply with these regulations will no longer be marketed.


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