STD-04-13

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• STD-04-13
• ETRTO comments on Inf. Document GRB-51-25 from
  Norway

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Test World results
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Test World results

• The test results of Test World are questionable
  at the temperature -8,5C. Indeed the tests
  results are significantly different from the
  results at -8.1C and from all the other values
  and cannot be explained.
• By removing this column, tests results in average
  are in line with the tests results of ADAC and
  show that Nordic tyres are performing the best ,
  then the winter tyres followed by All Seasons
  tyres.

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Test World results
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ETRTO test results

• Test World testing results are based on one tyre
  size (205/55R16). The same size measured during
  the TI round robin test confirm the value of the
  ContiVickingContact compared to Test World
  results.

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ETRTO test results
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Threshold ABS Braking on Snow Test Results -
ADAC Winter Tire Test 2009 in 205/55 R 16
STD-03-09e
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12
Threshold area for Snowflake (
107)
Snow braking ABS ADAC grade
recalculated data
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Conclusions

• These tests performed by Test World, ADAC and
  ETRTO shows that the threshold of 107 is
  challenging and good enough to discriminate
  summer tyres from winter tyres which is the
  purpose of the new specification required in
  order to classify a tyre in the category of use
  snow.