Key points

• The load index of the sprayer’s tyres will determine the weight that the tyres can carry at any given speed. Having a tyre with an inappropriate load index may require the tyre pressure to be increased to carry the load

• Increasing the inflation pressure in the tyre to its maximum can affect the sprayer’s handling, operator comfort and the life of the tyre

• The weight and balance of the sprayer needs to be taken into account when selecting tyres and determining appropriate tyre pressures

• Always consider the sprayer manufacturer’s recommendations for weight and balance (ballast limits) and the tyre manufacturer’s recommendations for installation and load index

• Use a weigh bridge to work out weights with tank empty/full, boom folded/unfolded and front/back axle distribution.