To provide an aluminum wheel capable of effectively reducing resonance peak level of the wheel by efficiently obtaining rigidity change of a secondary component of the wheel on the circumference thereof without complicating structure nor increasing weight.
A plurality of narrow grooves 10 and 11 extended in the radial direction are formed in a peripheral edge part 3B of a rim-disk bonding part 3A formed thick in a back surface of a disk 3 and a hub fitting surface 4 in the circumferential direction. Among three elements of groove intervals I1 and I2, groove width W1 and W2 and groove depth D1 and D2 of the narrow grooves 10 and 11, the groove intervals I1 and I2 are formed different from each other to obtain rigidity change of a secondary component of the aluminum wheel 1 on the circumference thereof. With this structure, appearance can be excellently maintained and circumferential rigidity of the wheel can be effectively changed without complicating structure nor increasing weight.
Iwa Saki Kokuni
Akira Kurihara
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu