| 摘要 |
<p>A runflat tire construction is optimized for tire ride comfort by reducing tire wall gauges (G1, G2, G3) in the tread-shoulder-to-upper-sidewall transition region (117a, 117b, 176a, 176b) and compensating with supporting sidewalls (116, 118, 177, 178) that constantly increase in thickness (gauge) from the transition region to a bead/flange area (148a, 148b, 172a, 172b) where a chafer (144a, 144b, 162a, 162b) extends above a wheel rim flange. Thus the bead and lower sidewall area are reinforced to a maximum and the shoulder area gets only the minimum stiffness necessary to achieve the required runflat performance. Within the context of wall gauges that constantly increase from the transition region to the bead/flange area, a mid-sidewall gauge ratio (MSGR), being equal to a mid-sidewall gauge (G2) divided by a shoulder gauge (G1), is approximately within the range of 1.1 to 1.4, preferably approximately equal to 1.3; and a bead/flange gauge ratio (BFGR), being equal to a bead/flange gauge (G3) divided by a shoulder gauge (G1), is approximately within the range of 1.5 to 1.8, preferably approximately equal to 1.7. <IMAGE></p> |
