What Does ET Value Mean?
3 Answers
Tire ET value refers to the Off-set value, which is the offset distance between the mounting surface of the wheel hub and the centerline of the wheel rim, measured in millimeters. It can be positive, zero, or negative. Below is more related information: 1. Definition: Off-set is defined as the distance between the mounting surface of the wheel rim and the center of the wheel rim. A positive value indicates an outward direction, while a negative value indicates an inward direction. When the Offset value is 0, the contact surface between the wheel and the hub is at the centerline of the wheel. When the Offset is positive, the contact surface is more biased toward the inside. 2. Impact: Changing the ET value also affects the load on the bearings. Generally, the design of the set in most cars aims for the lowest bearing load during straight-line driving. Although using a wheel rim with a smaller positive ET value may slightly increase the bearing load during straight-line driving (changes in Off-set within 50mm do not require excessive concern about bearing load issues), it can reduce the load during cornering.
Let me tell you about wheel ET value. Simply put, it's the distance from the wheel mounting surface to the wheel centerline, measured in millimeters. The smaller the ET value, the more the wheel protrudes outward, making the car look particularly aggressive; the larger the ET value, the more the wheel tucks inward. Last time I helped a friend modify their car, we installed wheels with a smaller ET value, and the car's stance immediately changed. But be careful not to modify it recklessly—incorrect ET values might cause rubbing against the suspension or brake calipers, and in severe cases, it could affect steering. If you want to modify it, it's best to have a professional shop measure the original factory data first and then recommend the appropriate value, as safety is the top priority.
My car enthusiast friends always talk about ET value, which is actually the code for wheel offset. Imagine a centerline running through the middle of the wheel - the ET value represents the distance from the mounting surface to this line. A smaller ET value makes the wheels protrude outward, giving the tires a fuller appearance, while a larger ET value tucks them inward. When I modified the wheels on my Golf, I did extensive research. Swapping from the factory ET45 wheels to ET35 made the tires stick out a few millimeters beyond the fenders, creating a sporty look. However, you need to be careful not to go too extreme, or the tires might rub against the inner fender liners at full lock. I recommend measuring the distance between your stock wheels and fenders with a tape measure before modifying, leaving some margin for safety.
