Tyre Speed Rating Chart. Q 160kmh Winter Tyres. N 140kmh Spare Tyre.
R 170kmh 44 Bakkies Tyres. T 190kmh Family Sedans Van Tyres. Tire load rating chart.
Q 160kmh Winter Tyres.
A Y speed rating denotes maximum tire. Tire load limits lbs at various cold inflation pressures psi used in normal highway service. It is a two- or three-digit number that precedes the tyre speed letter at the very end of the code. Speed Rating Chart Designation.