Wheel Sizing

Wheel Sizing

Selecting the correct mag wheel size is important not just for fitting, but also for safety and driving comfort. This page will show you how you can determine the correct wheel size for your vehicle. If you are not sure, please do not hesitate to enquire with us. We have wheel and tyre experts that are happy to answer your questions.

Alloy Wheel Technical Information

Bolt Pattern / Pitch Circle Diameter (PCD)

Bolt patterns usually identified with two numbers, with the first number showing the number of lugs (or wheel nuts), and the second showing the distance between those lugs (calculated at the farthest adjacent lug). Example of a common bolt pattern is 5×120 which translates to 5 lugs at 120mm apart from one another. Refer diagram below showing how to calculate the lugs distance for a 4 and 5 lugs wheel.

Wheel Rim Dimension

Rim dimension usually shown in the format of Width (inch) x Diameter (inch). An example of the rim size for a 2016 Holden Commodore 3.6 SIDI is 8Jx18 ET38. This translates to rim width of 8 inches at 18 inches in diameter. Letter J refers to the wheel mounting flange and common letter is J for most passenger cars and JJ on SUVs. ET38 shows that the rim has a positive offset of 38mm.

If you need further information or would like to find out yourself based on your vehicle make and model, this is a useful link: https://www.wheel-size.com/size/

Please note the above (including images and links provided) are for reference and guidance only. West State Tyres is not liable for incorrect measurement or information prior to engagement with us for proper identification and advice.