Winter tyres tyre width 195 mm tyre cross section 55 rim diameter 16 inch load index 87 up to 545 kg speed rating h up to 130 mph installation all round tyre rolling resistance g wet grip e noise emission 71 db noise classification nc 2 runflat sipe asymmetrical tread runflat identification rft bridgestone run flat technology rft run flat tyres erstausrstung bmw