225/50 R 17 denotes the tyres dimensions

225 – tyre width in millimetres at correct air pressure

50 – tyre height in percentage of width

R – radial (the alternative is D for diagonal)

17 – rim diameter in inches 17 – rim diameter in inches

**94 W denotes the load index** 94 W denotes the load index

94 – load index (88 = maximum load of 560 kg) 94 – load index (88 = maximum load of 560 kg)

W – speed rating W – speed rating