Want to upgrade your ride with new wheels? With the huge selection of sizes and styles available, the question quickly arises: Which wheel actually fits my car? Don’t worry – ‘calculating wheel offset (ET)’ is not rocket science! In this article, we’ll explain step-by-step how to determine the correct wheel size and what to consider when buying new wheels.
Calculate Wheel Offset (ET)
What Exactly Does “ET” Mean for Wheels?
Offset, or ET for short (Einpresstiefe in German), is a crucial value that determines the position of the wheel in your car’s wheel well. It is specified in millimeters and indicates the distance between the wheel’s center line and the mounting surface. A positive ET means the mounting surface is further towards the outside, while a negative ET means it is further towards the inside.
Imagine the wheel is like a plate: The mounting surface would be the rim of the plate where the tire is attached. Depending on how deep the plate is (i.e., how large the ET is), the tire will sit further inside or outside the wheel well.
Why is the Correct ET So Important?
The ET influences several factors:
- Appearance: A low ET makes the wheels protrude further from the wheel arch and provides a sportier look.
- Handling: The ET affects the track width and thus your car’s handling. An incorrect ET can lead to poorer handling, increased tire wear, and even damage to the suspension.
- Clearance: The ET determines whether the wheel has enough space in the wheel well and doesn’t rub against the bodywork or suspension components.
Find Wheel Size
Finding the Right Wheel Offset (ET): Here’s How!
The easiest way to find the right ET for your car is to look in your vehicle documents or on the type plate in the vehicle. You will find all relevant information about approved wheel and tire combinations there.
Alternatively, you can use online wheel configurator tools. Simply enter your vehicle data, and the tool will show you all suitable wheels with the correct ET.
Tip: Consult a professional when buying new wheels. They can help you find the optimal wheel for your car and your needs.
What Happens if the ET is Incorrect?
An incorrect ET can lead to various problems:
- Rubbing against the bodywork or suspension components
- Change in handling
- Increased tire wear
- Problems during vehicle inspection
Conclusion
The correct ET is crucial for your car’s safety, handling, and appearance. Therefore, take the time to determine the appropriate wheel size before buying new wheels.
Still have questions about ‘calculating wheel offset (ET)’ or looking for more tips on car maintenance? Check out our other pages, for example on Porsche Macan 2014 or Fiat Ducato Wikipedia. Our experts are always ready to assist you!
