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

STD-04-13 ETRTO comments on Inf. Document GRB-51-25 from Norway. Test World results. Test World results.

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

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  1. STD-04-13 ETRTO comments on Inf. Document GRB-51-25 from Norway T h e E u r o p e a n T y r e a n d R i m T e c h n i c a l O r g a n i s a t i o n

  2. Test World results T h e E u r o p e a n T y r e a n d R i m T e c h n i c a l O r g a n i s a t i o n

  3. Test World results • The test results of Test World are questionable at the temperature -8,5°C. Indeed the tests results are significantly different from the results at -8.1°C 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. T h e E u r o p e a n T y r e a n d R i m T e c h n i c a l O r g a n i s a t i o n

  4. Test World results T h e E u r o p e a n T y r e a n d R i m T e c h n i c a l O r g a n i s a t i o n

  5. 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. T h e E u r o p e a n T y r e a n d R i m T e c h n i c a l O r g a n i s a t i o n

  6. ETRTO test results T h e E u r o p e a n T y r e a n d R i m T e c h n i c a l O r g a n i s a t i o n

  7. Threshold ABS Braking on Snow Test Results - ADAC Winter Tire Test 2009 in 205/55 R 16 STD-03-09e ~ 6%* ~ 12%* Threshold area for Snowflake (~ 107%) Snow braking ABS [ADAC grade] * = recalculated data

  8. 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”. T h e E u r o p e a n T y r e a n d R i m T e c h n i c a l O r g a n i s a t i o n

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