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Zimfit Blog

Basic Tyre Knowledge

What is a tyre?

It is a vessel for the air that carries the load and gives contact with the road surface.

Functions of a Pneumatic Tyre

  • Carries the load
  • Cushion the Cargo
  • Provide ride camfort
  • Absorb shock
  • Provide tread wear resistance qualities
  • Provide necessary traction and braking force
  • Transmit steering and braking forces to the road surface
  • Supply cornering and road handling ability
  • Provide fuel consumption efficiency

Advantages of a radial tyre

  • Weighs less and increase fuel efficiency
  • Cheaper to maintain
  • On truck tyres no lock rings required

Speed rating Symbols

A speed symbol indicates the speed at which the tyre can carry a load corresponding to its load index under manufacturer’s specified conditions.

Speed Symbol G J K L M N O P Q R S T U V W Y
Speed km/hr 90 100 110 120 130 140 150 160 170 180 190 200 210 240 270 300

Advantages of a low profile tyre

  • Improved surface grip and comfort
  • Improved steer control in time of tyre failure due to low height
  • Less rubber used in producing tyre and a lighter air vessel resulting in less NVM
  • Vehicle appearance improved
  • Cooler operation