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Test av is- och snögrepp för slitna vinterdäck: jämförelse av olika kategorier av vinterdäck
Swedish National Road and Transport Research Institute, Traffic and road users, Vehicle technology and simulation.ORCID iD: 0000-0002-8242-3407
Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.ORCID iD: 0000-0002-5306-2753
2015 (Swedish)Report (Other academic)Alternative title
Test of ice and snow grip for worn and new winter tyres : a comparison of different types of winter tyres (English)
Abstract [sv]

Denna studie har mätt is- och snögrepp för slitna och nya vinterdäck i syfte undersöka hur väggreppet för olika typerna av vinterdäck försämras med ålder och slitage. Totalt har 77 däck testats, varav 27 helt nya däck och 50 begagnade. Däcken har testats på slät is, samt packad snö. Resultaten visar bland annat att dubbdäcken tappar mer prestanda på slät is när de blir slitna än vad de odubbade gör, men att de trots detta ger ett klart bättre isgrepp än slitna dubbfria däck, av både nordisk och europeisk typ. De slitna europeiska däcken har överlag riktigt dåligt isgrepp, och presterar i nivå med två testade sommardäck. På snö har de nordiska dubbfria däcken generellt något bättre grepp än dubbdäcken, medan de dubbfria däcken av europeisk typ presterar sämre. Snögreppet för de slitna däcken är markant sämre för de dubbfria däcken av europeisk typ jämfört med de andra två vinterdäckstyperna. Studien visar också att premiumdäck överlag har tydligt bättre is- och snöprestanda jämfört med budgetdäcken, vilket gäller såväl nya som slitna däck.

Abstract [en]

This study has measured ice and snow grip for used and new winter tyres, with the purpose to investigate how the road grip on ice and snow for different types of winter tyres degrade by age and degree of wear. In total, 77 tyres have been tested, of which 27 were completely new while 50 were used. The tyres have been tested on smooth ice and packed snow. The results show that with respect to ice grip, the studded tyres have a larger performance decrease when worn, than the unstudded winter tyres. However, the ice grip of worn studded tyres were still clearly superior to that of worn unstudded tyres. The used unstudded tyres of European type have in general a very poor ice grip, on level with two summer tyres that were also tested. On snow, the unstudded winter tyres of Nordic type in general have a slightly better grip than the studded tyres, while the unstudded tyres of European type performs worse. The snow grip for the used tyres is significantly worse than used tyres of the other two types. The study also shows that the premium tyres in general have better ice and snow performance compared to the budget tyres, for both new and used tyres.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2015. , 149 p.
Series
VTI rapport, ISSN 0347-6030 ; 875
Keyword [en]
Tyre, Studded tyre, Winter, Snow, Icy road, Friction, Skidding resistance, Performance, Evaluation (assessment), Test
National Category
Vehicle Engineering
Research subject
90 Road: Vehicles and vehicle technology, 911 Road: Components of the vehicle
Identifiers
URN: urn:nbn:se:vti:diva-8265OAI: oai:DiVA.org:vti-8265DiVA: diva2:878116
Available from: 2015-12-08 Created: 2015-12-08 Last updated: 2016-04-12Bibliographically approved

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