What does 235/55R19 mean on UK car tyres?

235/55R19 on UK car tyres means: 235mm width, 55% aspect ratio (sidewall height to width ratio), radial construction (R), fitting 19-inch alloy wheels. Popular UK models like the Range Rover Evoque and BMW X3 often use this size. The 'R' stands for radial construction (standard for modern tyres), while 19 indicates the wheel diameter in inches. Other markings you might see include 'M+S' (mud and snow suitable) or 'XL' (extra load capacity). Always check your vehicle handbook for the correct tyre specifications, especially when replacing tyres on popular UK EVs like the Tesla Model Y or Jaguar I-PACE.