Where to Find the Wheel ET Value?

[Everdeen]

Wheel ET value is located on the back of the wheel, with detailed parameters on the label. More information about ET value is as follows: 1. ET value is also known as ET offset value. ET value refers to the Off-set value, which is the offset, the deviation between the mounting surface of the wheel and the centerline of the rim, measured in MM, and can be positive, zero, or negative. 2. Off-set is defined as the distance between the mounting surface of the rim and the center of the rim (Center-of-Rim). A positive offset (Positive-Offset) is towards the outer side, while a negative offset (Negative-Offset) is towards the inner side of the rim.

[VanRemington]

Last time I changed my rims, I specifically researched the ET value. Actually, you can find it on the inner backside of the rim. After removing the wheel, take a close look - it's usually engraved with parameters like J value, ET value, and center bore. The number following 'ET' is what you need. For example, ET45 means the mounting surface is inset 45mm from the wheel centerline. If the wheel isn't removed, you can use a flashlight to check the backside of the rim. If you still can't find it, the original wheel's inner label or manual might have this information. Reminder: Pay special attention to the ET value when selecting rims. Excessive deviation can cause tires to rub against brake calipers or fenders, affecting driving safety. When unsure, it's best to take photos and consult professional shops for confirmation.

[MacRichard]

The wheel ET value, simply put, is the wheel offset. The quickest way to check it is to look at the markings on the back of the wheel. It's usually engraved in the 'ETxx' format on the inner side, such as ET38. If you squat down and use a flashlight to illuminate the back of the wheel, you can find it by carefully searching the casting mark area. If it's really hard to see, you can also calculate it by measuring the distance from the mounting surface to the centerline and applying the formula. Personally, I recommend verifying this parameter before any modifications. A difference of just 5mm in ET value can cause the wheel to protrude and rub against the fender, or retract too much and interfere with the brakes. I've seen too many car enthusiasts overlook the ET value and end up having to use spacers as a fix.

[Eric]

Checking the wheel ET value is quite simple, as it is usually directly engraved during the casting process on the back of the wheel. Remove the wheel and look on the inner side for a combination of the letters 'ET' followed by numbers, such as ET40, which is a common specification. If you don't remove the wheel, some cars allow you to observe it from the side by turning the steering wheel to full lock. I remember last time when helping a neighbor check, I found his rear wheel ET value was engraved on the back of the spokes, and it was only visible with the help of a phone flashlight. This number is crucial as it determines whether the tire extends beyond the body of the car—too large and it may scrape the chassis, too small and it might rub against the fender.

[DelCarter]

Finding the wheel ET value is like a treasure hunt, with the inner side of the wheel being the treasure trove! I once crawled under the car to look for it—usually, markings like 'ET35' are engraved around the mounting surface. If the brake disc blocks your view, try using your phone to take a photo by reaching inside. Some wheels hide this parameter on the back of the spokes, requiring you to rotate the tire to find the right angle. If you still can't find it, don't worry—online wheel shopping pages always list this spec. A heads-up for all car modders: choosing the wrong ET value can affect steering return force. There was once a fellow enthusiast whose car pulled to the side due to just a 3mm ET deviation.

[Carol]

Checking the wheel ET value is quite straightforward - just look for the alphanumeric combination on the back of the wheel. The standard marking like '8J×17 ET45' clearly shows ET45 as the value. Last time I had to wipe off dust from the wheel inner surface with tissue to clearly see the engraved position. It's worth noting that some aftermarket wheels engrave ET values around the center disc, while OEM wheels typically mark them at the spoke roots. I recommend recording your original ET value for reference when modifying wheels. Deviations exceeding 10mm may cause abnormal wear to suspension components, which outweighs any benefits.