Perfectly suited for vehicles that need to blend performance, comfort, and higher load-bearing capabilities, 225/55 R17 tyres are often offered as UHP models for premium cars and crossovers. The number 225 is an indication of cross-section width, measured from one sidewall to the other, and expressed in millimetres.
Aspect ratio is indicated by the second number, 55. It expresses cross-section height, essentially the height of the sidewall, as a percentage of width. Here, cross-section height is 55% of 225 mm, our cross-section width. A percentual value is preferred because 225 is an approximate indication - small individual variances are normal.
The only letter in this description is R', which identifies a radial tyre. Most cars, crossovers, MPVs, SUVs, and other light vehicles use these - although some vintage tyres employ the older bias construction. The number 17 closes this section of the description - 17 inch rims only should be used with this tyre.
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