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Tyre Identification

Below is a simple guide to help you identify the right tyres for your vehicle. The sides of each tyre is marked with a code which identifies the tyre size , manufacturer, model etc. When buying a tyre, ask Wangara Tyre & Fitment Center for the tyre size. The tyre size is usually in this format: 205/40 R17. Here’s a summary of the most important information about tyres and what it means. Example: 205 40 R17 84W

  • 205 – means the tyre has a nominal section width of 205 millimetres
  • 40 – is referred to as the aspect ratio and is the height of the tyre sidewall as a percentage of the nominal section width
  • R – means the tyre has a radial construction, the most commonly used of three different types of tyre construction: cross ply, radial and bias belted
  • 17 – means it fits a 17″ diameter wheel
  • 84 – is the load index. This identifies the maximum load capacity of a tyre when driven at maximum speed. Overloading a tyre, by carrying more weight than it is designed to or running at a lower than specified pressure can cause heat build up and blow outs. Load indexes for passenger cars usually range from 70 – 110 and the maximum load per individual tyre is shown in the table below
  • W – is the speed rating which indicates the maximum speed for the tyre when the vehicle is at full load. Generally, maximum tyre speed is rated in alphabetical order. However, W and Y rated tyres are a special case as they can operate at higher maximum speeds than older Z rated tyres. It is therefore safe to replace your current Z rated tyres with W or Y rated tyres. The example shown is rated for speeds up to 168mph.

Load Index and Maximum Load per Individual Tyre

Load IndexLoad (kg)Load IndexLoad (kg)Load IndexLoad (kg)Load IndexLoad (kg)

Fitment Codes

Fitments codes are stamped on the tyre to help identify any special features making it better suited for certain driving styles or vehicles. See the list below for common fitment codes and an explanation of what they mean:

  • RE – Reinforced
  • RF – Run Flat
  • XL – Extra Load
  • WW – White Wall
  • OW – Outline White Lettering
  • MS – Mud and Snow
  • AS – Asymmetric
  • NO – Porsche Fitment
  • N1 – Porsche Fitment
  • N2 – Porsche Fitment
  • N3 – Porsche Fitment
  • C1 – Chrysler Fitment
  • K1 – Ferrari Fitment
  • B – Audi/Bentley/Continental GT Fitment
  • G1 – Various Fitment
  • A – Renault Espace 4 Fitment
  • * – BMW Fitment
  • MO – Mercedes Fitment
  • J – Jaguar Fitment
  • 6PR – 6 Ply
  • 8PR – 8 Ply
  • 10PR – 10 Ply

Ask your Wangara tyre technician for advice on tyre upsizing.

Common speed ratings are

  • Q – for cars with max speeds up to 100mph (160km/h)
  • R – for cars with max speeds up to 105mph (170km/h)
  • S – for cars with max speeds up to 113mph (180km/h)
  • T – for cars with max speeds up to 118mph (190km/h)
  • H – for cars with max speeds up to 130mph (210km/h)
  • V – for cars with max speeds up to 150mph (240km/h)
  • Z – for cars with speeds over 150mph (240km/h)
  • W – for cars with max speeds up to 168mph (270km/h)
  • Y – for cars with max speeds up to 186mph (300km/h)

You should always replace a car tyre with the same or a higher speed rating and we recommend that you check against the speed rating approved by the vehicle manufacturer.