TIRE STRUCTURE FOR IMPROVED TREAD LIFE

摘要

CAS 772 MICHELIN RECHERCHE ET TECHNIQUE TIRE STRUCTURE FOR IMPROVED TREAD LIFE A radial pneumatic tire (20) comprises a pair of axially spaced apart beads (42). A radially reinforced carcass (44) extends between and is secured at opposite end portions to the beads (42). The carcass (44) includes a plurality of parallel extending reinforcing members (203). Each of the reinforcing members is disposed in a radial plane. A tread (22) is located radially outward of a crown portion of the carcass (44). The tread (22) is for engagement with a ground surface. A belt reinforcement package (46) is disposed between the carcass (44) and the tread (22). A rolling contact width of the tread portion is relatively large. A cross sectional width of the tire is 1.0 percent to about 10 percent greater than the same width of an industry standard tire. An outside diameter of the tire is 0.1 percent to 5.0 percent less than the same diameter of an industry standard tire. A profile has a radius of curvature R1 of said carcass measured with respect to a surface perpendicular to a mid-circumferential plane of said tire in a range of three times to four times the carcass radius Rc when the tire is properly inflated. The radius of curvature extending two degrees to either side of the mid-circumferential plane. "' . FIG 5