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Light Truck/4x4 Tyre Sizing

Sizing for light truck tyres takes the performance requirements of the vehicle and the tyres into account. Light truck tyres have evolved along with the expanded applications of trucks and vans which have grown to be multi-purpose vehicles that we use for work, for play or as passenger vehicles. There are four different light truck tyre sizing systems: European Metric, Light Truck Metric, Light Truck High Flotation and Light Truck Numeric.

	185 = Section width in millimetres R = Radial construction 14 = Rim diameter in inches XCD = Tread pattern

This sizing system mirrors the European metric system for passenger tyres.

	LT = Light truck designation 235 = Section width in millimeters 75 = Aspect ratio R = Radial construction 15 = Rim diameter in inches

Light truck high flotation tyres evolved in the mid 1970s as lower aspect ratio tyres became more popular on light trucks and vans. The combination of lower aspect ratios and high flotation yielded better traction on sand and soft soil found in off-road situations.

	31 = Tyre overall diameter in inches 10.50 = Section width in inches R = Radial construction 15 = Rim diameter in inches LT = Light truck

This older system is still widely used, mostly on commercial vehicles.

	7.50 = Section width in inches R = Radial construction 16 = Rim diameter in inches C = Camionette (LT)