Summer tyre tyre width 225 mm tyre cross section 50 rim diameter 17 inch speed rating y up to 186 mph rolling resistance c wet grip a noise emission 71 db noise classification nc 2 runflat rim protector sipes 4 longitudinal grooves asymmetrical tread unidirectional tread listed since 24052016 0929 rim protection marking fp mfs fr fl fsl ml rpb tyre size required 22550 r17