These unstudded all-season tyres from Michelin have a diameter of 17". The speed index is W (270 km/h), and describes the maximum permissible speed of the tire.
From Protyre
120/70ZR17 (58W) Michelin Pilot Road 4 120/70R17 (58W) | Protyre - Car Tyres
The product is available from £87.98 at international stores.
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