Tyre Size
Tyre size is expressed in a standardised format printed on the tyre sidewall, such as 205/55R16 91V. This code tells you the section width (205mm), aspect ratio (55%), construction type (R for radial), rim diameter (16 inches), load index (91 = 615kg), and speed rating (V = 240km/h). Using the correct tyre size is a legal requirement in the UK — fitting incorrect sizes affects handling, speedometer accuracy, and can invalidate insurance.
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TyreOps includes tools designed around tyre size and related tyre operations. Manage your entire tyre business from one platform.
Related Terms
More Tyre Specifications Terms
Aspect Ratio
The aspect ratio of a tyre is the ratio of its sidewall height to its width, exp...
Bias Ply Tyre
A bias ply tyre has its internal cords arranged in a criss-cross pattern at angl...
DOT Code
The DOT code is a series of characters stamped on the tyre sidewall by the manuf...
ECE Marking
The ECE marking (also called the E-mark) is a regulatory approval stamp on the t...
EU Tyre Label
The EU Tyre Label is a mandatory labelling system introduced under EU Regulation...
Homologation
Homologation is the process by which a tyre is certified to meet the specific re...
