What is the modification range for wheel ET value?

[McTalia]

Wheel ET value modification range should not exceed 5 millimeters. Introduction to wheel ET value: ET value, also known as ET offset, refers to the deviation 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. Modification considerations: Changing the wheel rim's Offset will alter the vehicle's track width, which is the distance between the centerlines of the tires. Therefore, simply increasing the size of the wheel rim and tires without changing the Offset will not affect the track width. If a wheel rim with a smaller positive Offset value is used, it will widen the track width, thereby reducing the shift in the vehicle's center of gravity during cornering and improving the cornering speed limit.

[Stacy]

The wheel ET value refers to the offset of the mounting surface. A positive value means the wheel is offset towards the inside of the vehicle body, while a negative value indicates an outward offset. When modifying, you shouldn't make drastic changes arbitrarily, as it can easily lead to issues. Generally, the safe range is within a fluctuation of 5 to 10 mm from the original ET value. For example, if the original ET is 45mm, changing to 40mm or 50mm is acceptable. If the modification is too large, the wheels may protrude beyond the body, causing rubbing against the fenders or rapid tire wear. If the modification is too small, the inner side may interfere with the braking system, affecting steering. I recommend starting with lightweight modifications, choosing matching wheels, and testing the smoothness of steering and braking after installation. It's best to have a professional shop inspect it to avoid issues like vibrations or instability later. Also, consider legal restrictions—some places don't allow wheels to protrude too much, or you might face penalties. Modifications are for aesthetics and handling, but safety should always come first. Don't blindly pursue oversized wide wheels; just do what's within your means.

[CameronAnn]

Changing the wheel ET value essentially means adjusting the wheel position. I recommend keeping the modification range within ±5 to ±10 mm of the factory ET. Excessive changes can burden the vehicle—for instance, too much negative ET may cause the wheels to protrude, leading to fender rubbing or accelerated tire wear, while excessive positive ET might result in insufficient brake disc clearance. Before modification, measure the spacing to ensure the new wheels won't interfere with the suspension or brake calipers. In practice, compare wheel dimension diagrams with different ET values first, and test-fit by rotating the wheels to check for any interference. If you're unsure, don't attempt it yourself—consult a skilled mechanic for adjustment and perform a four-wheel alignment for balance. Also, adjust tire pressure and load capacity properly to avoid issues when fully loaded. The joy of safe modifications lies in the details—don't overdo it.

[Billy]

When modifying wheel ET values, keep the range within ±10mm of the original. For example, if the original ET is 40, changing it to 35 or 45mm is acceptable. Going too far may cause the wheels to protrude excessively, risking body contact or legal issues. I always measure the clearance first and test steering and braking after installation. Safety comes first—it saves money and hassle.