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155/80 R14 Tyre Size Explained

155/80 R14 is a size designation for a narrow tyre seen on older small cars. These small tyres have tall sidewalls to absorb shock from rough roads. The numbers are basic. 155 is the width of the tyre in millimetres. 80 is the sidewall as a percentage giving a sidewall of 124mm. R14 means a radial tyre that fits a 14-inch rim. This gives an overall diameter of 604mm. Along with C-marked versions of this tyre, we offer 155/80 R14 on Tyres.co.uk.

Part of the sizeValueWhat it means
Section width 155 The width of the tyre across the tread, measured in millimetres.
Profile (aspect ratio) 80 Sidewall height as a percentage of the width - here, 80% of 155 mm (about 124 mm).
Construction R Radial construction, which is what nearly all road tyres use.
Rim diameter 14 The wheel diameter the tyre fits, measured in inches.
Your tyre dimensions
MeasurementValue
Sidewall height 124.0 mm (4.88 in)
Overall diameter 604 mm (23.8 in)
Circumference 1,896 mm (74.7 in)
Revolutions 849 per mile · 527 per km
Equivalent sizes
SizeOverall diameter
175/70 R14 601 mm · -0.5%
175/65 R15 608 mm · +0.8%
135/80 R15 597 mm · -1.1%
175/80 R13 610 mm · +1.1%
165/65 R15 596 mm · -1.3%
165/80 R13 594 mm · -1.6%