2. Incorrect selection of wheels and tires can adversely affect handling, wheel and bearing life, brake cooling, speedometer/odometer accuracy, braking distance, headlight direction, bumper height, ground clearance, and tire-to-body clearance.
Depending on the type of tires, the following disks are installed, as indicated in the table "Correspondence of tire sizes to wheel disk parameters".
- As an example, a possible marking is given: 6Jx15H2 ET38 4H PCD114,3 D1A67
In wheel disk markings, the first digit "6" denotes the rim width (H), expressed either in millimeters or inches. The letter "J" denotes the rim shape. The subsequent number "15" denotes the wheel disk seat diameter (D) in inches, which must match the seat diameter of the tire being installed. The number "38" after the letters ET denotes the disk offset (ET) in millimeters.
The markings also contain the following symbols: "H" or "H2" means the presence of one or two annular protrusions on the rim; "4H" indicates the number of holes for mounting bolts or studs; the numbers after the designation "DIA" are the diameter of the central hole; the numbers after the designation "PCD" are the diameter of the holes for the mounting bolts or studs.