In a discussion with Tyre Trends, Chief of the United Nations Economic Commission for Europe (UNECE) Information Unit Jean Rodriguez detailed how the Working Party on Noise and Tyres (GRBP) is driving international regulations on tyre safety, noise and sustainability. From pioneering micro-plastic emission measurement to strengthening wet-grip requirements and updating studded and retreaded tyre rules, Rodriguez emphasised UNECE’s role in shaping a harmonised global framework that balances consumer safety with environmental protection.

What is the role of the Working Party on Noise and Tyres (GRBP) within UNECE?

As one of the six subsidiary bodies of the World Forum for Harmonisation of Vehicle Regulations, hosted by UNECE, the Working Party on Noise and Tyres continues to spearhead globally harmonised standards through UN Regulation No. 117, covering tyre rolling resistance, noise, wet grip and, with recent developments, abrasion measures. These UN Regulations form the backbone of safety and environmental tyre specifications adopted by numerous countries and a substantial share of tyre producers globally.

What were the key regulatory changes between 2022 and 2025?

In early 2024, the Working Party adopted the first-ever methodology to measure particle emissions from tyres, critical for tracking micro-plastic emissions via two protocols including real-world 8,000 kilometres convoy tests and 5,000 kilometres rolling-drum lab tests. These are slated for integration into a new UN Regulation by September 2025 for passenger tyres, expanding into heavier vehicle categories (C2, C3) into 2026 and 2027.

Once in force, these regulations will contribute to significantly reducing micro-plastic pollution. In 2016, tyre abrasion was estimated to represent 78 percent of the 1.3 million metric tonnes of microplastics entering the ocean.

The UNECE methodology to measure particle emissions from tyres will become the reference methodology of the Euro 7 proposal of the European Union. Moreover, EU tyre regulation and labelling covering noise, wet grip, rolling resistance and environmental transparency build directly on UNECE’s standards.

How has UNECE addressed tyre safety at legal minimum tread depth?

GRBP introduced requirements ensuring that tyres at the legal minimum tread depth (1.6 millimetres) retain a minimum wet-grip level relative to new tyres. This is a shift towards safety and sustainability by permitting consumers to drive worn tyres safely, potentially reducing waste. It obliges manufacturers to design tread compounds and patterns that preserve wet performance over the tyre’s life, not just when new.

What regulations were introduced for studded tyres in 2022?

In September 2022, a new UN Regulation to cover performance requirements and marking of studded tyres entered into force to increase road safety by introducing harmonised snow grip requirements for studded tyres. It simplified the legislative situation in several countries that allowed the usage of studded tyres on public roads, introduced strict requirements and procedures for testing their snow grip and allowed consumers to benefit from more coherent winter tyre markings.

What additional areas has UNECE been working on to align safety and environmental goals?

By refining noise standards, updating testing protocols and promoting tyre lifecycle efficiency, UNECE is steadily shaping regulations to match environmental and safety objectives. This includes work on enhanced noise testing for tyres (UN Regulation No. 117) and motorcycles (UN Regulation No. 41) and vehicle alert systems (UN Regulation No. 138/51)

How does UNECE ensure global relevance, transparency and participation in its work?

All this work in setting technical specifications testifies to UNECE’s high relevance in providing a global harmonisation framework. Its expanding scope, especially in environmental dimensions such as micro-plastic emissions, is helping it maintain policy leadership and normative force, shaping tyre safety, noise and environmental performance worldwide.

A very important aspect of UNECE work is that it prevents fragmentation of the tyre regulatory landscape. GRBP is open to governmental experts from any member country of the United Nations and to any regional economic integration organisation set up by member countries of the United Nations including experts of governmental organisations and non-governmental organisations (NGOs).

UNECE provides secretarial support to WP.29 and its working parties, facilitating negotiations between contracting parties to the 1958, 1997 and 1998 agreements. More than 100 experts participate in the sessions of GRBP and all documents considered by GRBP are available in the public domain.

What are UNECE’s priorities going forward to support safety and the circular economy?

Leveraging its technical authority and norm-setting capacities, UNECE is uniquely positioned to foster a globally harmonised tyre labelling framework that covers rolling resistance, wet grip and, for the first time, tyre abrasion. This framework promotes consistency, environmental protection, consumer transparency and ultimately supports worldwide regulatory alignment.

At its session in September 2025, GRBP will consider the proposal for a new UN Regulation on the uniform provisions concerning the approval of tyres with regard to abrasion performance.

UNECE is also updating UN Regulations no. 108 (passenger car/towed vehicle Retreaded tyres), 109 (commercial vehicle retreaded tyres) and 172 (snow performance of retreaded tyres) to ensure retreaded tyres meet the same safety standards as new tyres, even in challenging winter conditions but in a way that makes regulatory processes smoother and more conducive to circular economy practices.

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Hankook Tire has appointed Seunghwan (Aaron) Hong as Vice President of Marketing for its North America Headquarters in Nashville. He assumes this position following the promotion of Kyuwang (Ken) Cho, who is now leading the company’s Global Truck & Bus Division from Seoul.

In his new capacity, Hong will be responsible for North American marketing strategy, technical services, Canadian operations and supply chain logistics, focusing on strengthening the brand’s support for regional tyre dealers. Hong’s extensive two-decade career with Hankook includes leadership roles such as Managing Director in Canada and the Netherlands, along with a strategic position in the Global TB sales division.

Cho, who previously served as Senior Vice President of Sales and Marketing in North America, returns to Korea, where he had earlier held a senior global sales role within the TB division.

Rob Williams, President, Hankook Tire America Corp., said, "We're thrilled to welcome Aaron to Nashville as our new Vice President of Marketing. He brings a wealth of global experience and a proven ability to drive growth across diverse markets. As we continue to expand our brand and strengthen relationships with our dealers throughout North America, Aaron's strategic vision will be key to advancing Hankook's innovation and performance in the tyre market. We are appreciative of Ken's leadership over the past year in elevating our presence across both consumer and commercial channels."

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Scandinavian Enviro Systems has appointed Fredrik Aaben as its new Chief Executive Officer effective 16 January 2026. He succeeds Fredrik Emilson, who is stepping down from the role by mutual agreement. Emilson will remain with the company in a supportive capacity, serving as a Senior Advisor during the transitional period.

Aaben brings substantial financial and strategic experience to the position, having served as the company’s Chief Financial Officer since November 2024. His prior career includes close to eight years at Volvo Cars, where he most recently held the position of Head of Corporate Finance and gained extensive experience in finance, strategy and governance. His background also includes roles as Group Business Controller at Stena AB and work in management consulting. Aaben holds dual Master of Science degrees in Industrial Engineering and Management and in Software Engineering from Chalmers University of Technology.

Concurrent with this change, Maria Ljungstrand has been promoted to Chief Financial Officer. She joined Scandinavian Enviro Systems in April 2024 as Head of Group Business Control and previously held business controller positions at Danone and Mondelez International.

The Board of Directors expressed gratitude to outgoing CEO Fredrik Emilson for his dedication and valuable contributions. Under his leadership, the company achieved significant developmental milestones, and the Board acknowledged his considerable efforts and commitment.

Ewa Björling, Chairman of the Board of Scandinavian Enviro Systems AB (publ), said, “The Board is very pleased to appoint Fredrik Aaben as Chief Executive Officer of Scandinavian Enviro Systems. Fredrik has a deep understanding of the company, its operations and strategic direction, and has demonstrated strong leadership, analytical capability and commitment during his time as Chief Financial Officer. With his extensive experience in finance, strategy and corporate governance, the Board has very strong confidence in Fredrik’s ability to lead Enviro forward and successfully drive the company’s continued development and growth.”

Aaben said, “I am excited to have been appointed Chief Executive Officer of Scandinavian Enviro Systems. Enviro is a company with a leading technology platform and a highly competent organisation. I look forward to working closely with the Board, the management team and all employees to drive execution and continue developing the company in line with its long-term ambitions.”

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Dunlop Aircraft Tyres, a leading independent global designer and manufacturer of high-performance aircraft tyres serving the commercial, military and freighter aircraft markets, has named Lee Timbrell as its new Chief Commercial Officer. In this position, he will oversee all global commercial functions such as sales, strategy, business development and customer relations.

Timbrell arrives from Safran Actuation Systems, where he most recently served as Senior Director of Aftermarket Services. There, he managed aftermarket sales and profitability across nine MRO facilities, led a large team and oversaw profit and loss for those operations. His background also includes senior commercial roles at Collins Aerospace, Cathay Pacific Airways and Turner Aviation.

Academically, Timbrell holds an MBA and a Postgraduate Certificate in Management from the University of Northampton, complemented by a Bachelor of Engineering in Aeronautical Engineering from Loughborough University. His experience was instrumental during the corporate transition when Safran acquired the actuation business from Collins Aerospace.

Susan McKenna, Chief Executive Officer, Dunlop Aircraft Tyres, said, "I'm delighted to welcome Lee to the Dunlop team. He joins us at a pivotal moment in our more than 100-year operating history, following strong financial performance in 2025 and the recent completion of our USD 93 million senior secured bond offering, which strengthens our balance sheet and provides added flexibility to support our future growth strategy. Lee brings extensive global aftermarket and customer leadership experience, with a proven record of driving growth and strengthening long-term partnerships. Having previously worked with Lee at Collins Aerospace, I am confident that his commercial expertise and deep industry knowledge will help accelerate Dunlop's next phase of growth."

Timbrell said, "I am thrilled to join Dunlop to elevate further the strong brand equity the company has established in the aviation industry over more than a century. I look forward to working with the team to advance the company's commercial strategy and deliver long-term value for our global customers and stakeholders."

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In a notable stride towards sustainable tyre manufacturing, Nokian Tyres has introduced the Betula concept tyre, which incorporates a pioneering compound derived from birch bark. This renewable substance is produced by the Swedish firm Reselo, which transforms residual matter from the global pulp, paper and plywood sectors into a viable tyre ingredient. For the first time, this birch-based material has been integrated into a tyre's tread compound, contributing to a tread where recycled and renewable resources now constitute 93 percent of all materials used.

This innovation is viewed as a way to enhance tyre performance. The Betula concept, which utilises the tread pattern of Nokian's Hakkapeliitta R5 winter tyre, has undergone successful testing at the company’s facilities in Ivalo, Finnish Lapland, and in Nokia, Finland. The project marks meaningful progress towards Nokian Tyres’ target of having 50 percent recycled and renewable materials in its tyres by 2030, aiming to establish new environmental standards for the industry through such pioneering efforts.

The collaboration with Reselo originated in 2023 when the biomaterials company won Nokian Tyres’ sustainable innovation challenge. A formal development agreement followed in 2024 to refine the renewable material for tyre applications, and joint development continues even after the concept tyre’s launch.

Concept tyres like the Betula are vital to Nokian’s development process, allowing new materials and technologies to be evaluated before commercial release. This approach has yielded several advanced prototypes, including the 2022 Green Step concept, which also achieved 93 percent renewable or recycled content, and the 2024 Green Step Ligna, featuring a renewable lignin-based alternative to carbon black. The company’s commitment is already reflected in production models, exemplified by the 2025 Nokian Seasonproof 2 all-season tyre for Central Europe, which contains up to 38 percent recycled and renewable materials – the highest proportion in the company’s current commercial lineup.

Teemu Soini, Vice President – Innovations & Development, Nokian Tyres, said, “Since the early stages, the potential of the material to be used in tyres has been evident. The Nokian Tyres Betula concept tyre confirms its applicability and highlights the material’s potential for commercial use in the future. Furthermore, the material is not only sustainable, but according to our testing, it also shows promise to improve tyre performance.”

Josefin Larsson, CEO, Reselo, said, “For Reselo, this partnership represents much more than a technical development project. The tyre industry’s sheer scale and traditionally conservative approach make it a challenging but vital space for rubber innovation, and seeing the collaboration with Nokian Tyres continue to the next level is something we’re especially proud of. Birch bark is a high-volume forestry side-stream abundant in the Nordics, and step by step, we are working together towards better-performing and more sustainable products with circularity at the core.”

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