Where is the wheel hub ET value located?
2 Answers
The wheel hub ET value is located on the back of the wheel hub. The ET value, also known as the ET offset, refers to the deviation between the mounting surface of the wheel hub and the centerline of the rim. The wheel hub is a cylindrical metal component that supports the tire from the inside, with its center mounted on the axle. It is also called the rim or steel ring and serves as an important part connecting the brake drum or brake disc, wheel disc, and axle. It works with the tire to support the wheel and also determines the tire specifications. Daily maintenance precautions for wheel hubs include: 1. When the wheel hub is at a high temperature, allow it to cool naturally before cleaning; do not use cold water for cleaning. 2. Do not use cleaning agents on aluminum alloy wheel hubs when they are hot. 3. When stubborn tar is stuck on the wheel hub, use a soft toothbrush to avoid damaging the hub surface.
When it comes to wheel ET values, I'm the most familiar after all these years of modification. It's usually stamped directly on the back of the wheel - just remove the tire and you'll see a raised steel mark, typically labeled with 'ET' followed by a number like ET40. This value actually represents the vertical distance from the wheel mounting surface to the centerline. Choosing the wrong one will either make the wheels protrude and rub against the fenders or sit too inward and interfere with the brake calipers. When I modified my Golf, I specifically measured the OEM value and finally selected ET45 wheels for proper fitment. If you can't find the marking, you can measure the wheel width and calculate it using a formula, but checking the marking directly is always the easiest way.
