What do the wheel data J and ET mean?

[LaSebastian]

J represents the shape and height of the wheel flange, while the ET value, also known as the ET offset, refers to the offset. The following are detailed explanations: 1. Considerations for J value installation: If the original tire is 195/65/15 and the standard tire should be 235/45/17, flatter tires are harder to find. During the modification process, based on the J value, the choice of tire width depends on the desired outcome. Selecting a point within the range affects handling and ride quality, with the midpoint offering a balance between the two. Choosing a narrower tire impacts handling, while a wider tire affects comfort. 2. Considerations for ET value installation: Changing the wheel's offset alters the vehicle's track width, which is the distance between the centerlines of the tires. Therefore, simply increasing the wheel and tire size without changing the offset does not affect the track width. Impact of changing the offset: Using a wheel with a smaller positive offset value widens the track width, reducing body roll during cornering and improving the vehicle's cornering speed limit.