What does the ET value of a tire mean?
1 Answers
Tire ET value refers to the offset value, which is the deviation between the mounting surface of the wheel hub and the centerline of the rim, measured in millimeters. It can be positive, zero, or negative. A positive offset means the mounting surface is towards the outer side, while a negative offset means it's towards the inner side of the rim. Changing the offset of the rim will alter the wheel track of the vehicle, which is the distance between the centerlines of the tires. Therefore, simply increasing the size of the rim and tire without changing the offset will not affect the wheel track. The ET value of the tire determines whether the wheel hub will rub against vehicle components. If the new wheel hub has a larger offset than the original or is too wide, it may cause friction with the vehicle's suspension system.