What do the wheel data J and ET mean?

[McDamian]

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, the standard tire should be 235/45/17. The flatter the tire, the harder it is to find. During modification, based on the J value, choosing which width of tire depends on what you aim to achieve. Selecting a point within the range affects both handling and ride quality, with the midpoint offering a balance. Narrower tires may impact handling, while wider tires may affect comfort. 2. Considerations for ET value installation: Changing the wheel's offset alters the vehicle's track width, which is the distance between the tire centerlines. 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, reducing body roll during cornering and improving the car's cornering speed limit.