PURPOSE: To reduce the actual vibration level of a vehicle at the time of running, by correcting uniformity with a balance wt. and simultaneously reduce the vibration generating forces of the vehicle caused by residual balance and residual uniformity.
CONSTITUTION: In addition to a balance wt. 4 for merely correcting the wt. balance of a tire in the direction shown by an arrow 3, a balance wt. 6 corresponding to a position 5 where the radial force variation (RFV) being the force variation of the tire in the radius direction thereof becomes max. is mounted. By this constitution, the vibration force of a vehicle due to the non-uniformity of the tire is set off by the centrifugal force of the balance wt. 6 and the vibration of the vehicle is suppressed to a lower degree. Because the correction by the balance wt. 6 is performed after the correction of wt. unbalance due to the balance wt. 4, wt. unbalance including the effect of residual unbalance on the vibration of the vehicle is corrected and the actual vibration of the vehicle in a running state is suppressed low.
MAEDA YUKIO
DOBASHI OSAMU
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