LOW ROLLING RESISTANCE TYRES

This article presents the results of a new set of tests of low rolling resistance (LRR) tyres, performed on a dry tarmac surface at a disused airport. The aim of the tests was to compare the friction, generated by conventional and LRR tyres under locked wheel skidding and heavy antilock braking system (ABS) braking, to examine tyre manufacturers' claims. The tests were conducted so that any significant change in coefficient of friction with time would be noticeable. Goodyear Eagle NCT 2 (conventional) and Michelin Energy MXV3A (LRR) tyres were used. For each set of tyres, four locked-wheel skid tests and four tests using full ABS braking were conducted, using a Vauxhall Carlton car from a velocity of about 40mph. A K15 radar gun was used to measure the speed, and a chalk gun was used to measure the braked distance. The car also had a Turnkey Instruments SkidMan to measure its skid marks. The tests disclosed no statistically significant differences between the friction developed by the different tyres, or between the length of the skid marks that they left. The only difference found between the two different types of tyres was in their appearance after a skid.

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  • Corporate Authors:

    METROPOLITAN POLICE FORENSIC SCIENCES LABORATORY

    109 LAMBETH ROAD
    LONDON,   United Kingdom  SE1 7LP
  • Authors:
    • HAGUE, D
  • Publication Date: 1996

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 36-7
  • Serial:
    • IMPACT (ITA1)
    • Volume: 5
    • Issue Number: 2
    • Publisher: METROPOLITAN POLICE FORENSIC SCIENCES LABORATORY
    • ISSN: 0959-4302

Subject/Index Terms

Filing Info

  • Accession Number: 00729181
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM