Winter tyres tyre width 245 mm tyre cross section 45 rim diameter 17 inch load index 99 up to 775 kg speed rating v up to 149 mph installation all round tyre rolling resistance c wet grip b noise emission 71 db noise classification nc 2 runflat rim protector sipes symmetrical tread directional tread self sealing tyre runflat identification rof goodyear run flat technology rof runonflat rim protection marking fp mfs fr fl fsl