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Know your tyres.
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Charts and rules for people who fit and sell tyres in the UK. Free, no sign-up.
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Tyre size explained (UK): reading 205/55 R16 91VWidth, profile, rim, load, speed, and the letters squeezed in between.
Tyre date code UK: how to read the DOT and E-markWeek then year, the E11 mark, and when an old tyre stays off the rack.
Tyre tread depth chart UK: the 1.6 mm legal limit1.6 mm legal, 2 mm for part-worns, and where a sensible garage draws the line.
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Tyre reference
REFERENCETyre size explained (UK): reading 205/55 R16 91VWidth, profile, rim, load, speed, and the letters squeezed in between.5 min →REFERENCETyre date code UK: how to read the DOT and E-markWeek then year, the E11 mark, and when an old tyre stays off the rack.5 min →REFERENCETyre tread depth chart UK: the 1.6 mm legal limit1.6 mm legal, 2 mm for part-worns, and where a sensible garage draws the line.7 min →REFERENCETyre load index and speed rating chart (kg, km/h, mph)Load index in kg, speed symbol in km/h and mph, and when a lower one is a problem.7 min →
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Tyre guides in other languages
Each one written for its own country and its own rules.