Buy 165/35 R18 Tyres

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165/35 R18 Dimensions Explained

165/35 R18 is a special size for modified vehicles with larger wheels. The first number is the width of the tyre in mm, so 165 means 165mm tyre width. The next number, the aspect ratio, is 35%, so this would mean a sidewall height of 58mm. R18 means this is a radial tyre that fits on an 18-inch rim, therefore the overall diameter will be 573mm. The sidewall is shallow so will cushion less on rough terrain. Tyres.co.uk stocks 165/35 R18, including the XL variants.

Part of the sizeValueWhat it means
Section width 165 The width of the tyre across the tread, measured in millimetres.
Profile (aspect ratio) 35 Sidewall height as a percentage of the width - here, 35% of 165 mm (about 58 mm).
Construction R Radial construction, which is what nearly all road tyres use.
Rim diameter 18 The wheel diameter the tyre fits, measured in inches.
Your tyre dimensions
MeasurementValue
Sidewall height 57.8 mm (2.27 in)
Overall diameter 573 mm (22.5 in)
Circumference 1,799 mm (70.8 in)
Revolutions 894 per mile · 556 per km
Similar sizes
SizeOverall diameter
165/40 R17 564 mm · -1.6%