| 摘要 |
PROBLEM TO BE SOLVED: To reduce high-speed RFV primary modification by maintaining vibration property at a normal speed. SOLUTION: Low-speed RFV primary modification (hereinafter referred to as 'low V primary'), low-speed PRO primary modification (hereinafter referred to as 'low O primary'), or an unbalance weight quantity (hereinafter referred to as 'UW quantity') is measured. The low V primary is measured and an adjustment piece 10 having a weight of M1 is pasted on a waveform P1 of the low R primary by equation (1), and the low O primary is measured and an adjustment piece 10 having a weight of M2 is pasted on a waveform P2 of the low O primary by equation (2), and the UW quantity is measured and an adjustment piece 10 having a weight of M3 is pasted on P3, namely, on HS of a tread part 2 by equation (3). M1= (F×TR)/322}×1,000×a1...(1), M2= (RO×TR)/322}×1,000×a2...(2), M3=UB×(RR/TR)×a3...(3) (F is the value of the low R primary (N), RO is the value of the low O primary (mm) or the value of the UW quantity (g), TR is the tire radius (m), RR is the rim radius (m), a1 is a coefficient in the range of 0.5-3.0, a2 is a coefficient in the range of 100-400, and a3 is a coefficient in the range of 0.5-2.0).
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