Bridgestone South Africa

Effective Tyre Selection

The type and intended use at the vehicle must be analysed before determining whether it is better to use standard original equipment tyres approved optional tyres. Because conditions vary widely, tyres should be selected carefully to assure maximum tyre life. For example, a dump truck may be used to haul gravel over a public road from pit to job, or to haul gravel at much slower speeds just in the pit or on a construction project.

If additional load capacity or extra flotation is required, the vehicle and rim/wheel manufacturers must be consulted. To select the right tyre for the job the following must be taken into consideration:

  1. The correct size
  2. The axle/vehicle maximum weight rating
  3. The correct tyre inflation
  4. If special non-OE tyre sizes or types are required, determine what factors, in addition to those above, must be considered.

Determine the correct tyre size

Before selecting a replacement tyre always refer to the vehicle tyre information manual. When selecting a replacement tyre size that different from the size or sizes shown in the manual, ensure that the replacement size has adequate load carrying capacity.

Always consult tyre and vehicle manufacture manuals for rim selection, tyre/vehicle clearance for replacement tyres and other considerations.

Determine the axle/vehicle maximum weight rating

The capacity of the tyre or the rim must not be exceeded by the load per tyre. Rim/wheels manufacturer's manuals must be consulted and sometimes tyres may be rated at higher loads, than some rims/wheels will carry.

Determine the correct inflation for replacement tyres

The tyre inflation pressure must correspond to the tyre load to be carried. Select the correct pressures from the load/inflation tables supplied by the tyre manufacturer or dealer. When using lower inflation pressures for additional flotation on sandy surfaces, it is imperative that the tyres be inflated to the recommended inflation pressure before resuming driving on hard surfaces.

Determine if special non-OE tyre sizes or tyres are needed and what factors, in addition to those above, must be concidered

Firstly, a tyre size must be selected that will have suitable load carrying capacity at an appropriate inflation pressure for the application.

Secondly, when selecting, the correct type of tyre or tread design, speed, distance and road conditions must be taken into consideration. For example, excessive heat can build up due to sustained high speeds and cause tyre damage or failure. Always be aware of any speed restrictions on tyres.

For assistance in selecting the correct tyre for a given axle position and/or operating conditions, consult the vehicle manufacturer's manual.

Bridgestone South Africa

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