Winter tyres tyre width 205 mm tyre cross section 55 rim diameter 17 inch load index 95 up to 690 kg speed rating v up to 149 mph installation all round tyre rolling resistance c wet grip c noise emission 72 db noise classification nc 2 runflat sipe asymmetrical tread runflat identification ssr csr sst continental run flat technology ssr self supporting runflat tyre