Gross axle weight rating

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Gross axle weight rating (GAWR) is the maximum distributed weight that may be supported by an axle of a road vehicle. Typically GAWR is followed by either the letters FT or RR, which indicate Front or Rear axles respectively.

[edit] Importance

Road damage rises steeply with axle weight and is estimated to be proportional to the fourth power of the axle weight. This means that doubling the axle weight will increase road damage (2x2x2x2)=16 times. For this reason trucks with a high axle weight are heavily taxed in most countries.