What does 17x7j mean in wheel rims?

[Jenkins]

The 17 in 17x7j indicates that the diameter of the wheel rim is 17 inches, the 7 means the width of the wheel rim is 7 inches, and the j signifies that the rim edge code of this wheel rim is j. The wheel rim is the rotating part of the tire's inner contour steel connected by pillars to the wheel hub, which is the metal component at the center supporting the tire mounted on the axle. Methods for maintaining wheel rims include: 1. When the vehicle is in a humid area, the wheel rims should be cleaned frequently to prevent salt from corroding the aluminum surface; 2. After thorough cleaning, waxing the wheel rims can be done if necessary to maintain their shine; 3. When the wheel rims are at a high temperature, allow them to cool naturally before cleaning, and avoid using cold water for washing.