DISK WHEEL FOR PASSENGER CAR

摘要

PROBLEM TO BE SOLVED: To reduce weight without deteriorating a fatigue life in a rotary bending endurance test, in a disk wheel for a passenger car having a decorative hole. SOLUTION: A flange 7 of a disk 2 is engaged with a drop part 1a of a rim 1. A hub fitting part 3 of the disk 2 is set to be equal to an original board thickness of a material or to be thinner than it. Board thicknesses of a hat midslope part 4 and a hat top part 5 are set to be thinner than that of the part 3. A board thickness of a decorative hole part 6 is set to be equal to the original board thickness of the material. A board thickness of a flange part 7 is set to be thinnest in all the parts hereinbefore. An end part of a decorative hole 8 is formed with a chamfering 9.