如何看懂轮胎规格参数说明
如何看懂轮胎规格参数说明Speed Ratings Speed Rating Maximum Speed Speed Rating Maximum Speed
B 50 km/h (31 mph) P 150 km/h (93 mph)
C 60 km/h (37 mph) Q 160 km/h (99 mph)
D 65 km/h (40 mph) R 170 km/h (106 mph)
E 70 km/h (43 mph) S 180 km/h (112 mph)
F 80 km/h (50 mph) T 190 km/h (118 mph)
G 90 km/h (56 mph) U 200 km/h (124 mph)
J 100 km/h (62 mph) H 210 km/h (130 mph)
K 110 km/h (68 mph) V 240 km/h (150 mph)
L 120 km/h (75 mph) W 270 km/h (169 mph)
M 130 km/h (81 mph) Y 300 km/h (188 mph)
N 140 km/h (87 mph) Z 240+ km/h (149 mph)
Tire Types
All Season Tires: Designated M & S (mud and snow). And may carry S, T or no speed rating. These tires cannot match the steering response of Touring or Performance tires but do provide - for a reasonable price - a smooth, quiet ride and predictable handling. Designed for balanced performance in all weathers - wet, dry and snowy conditions.
Standard Touring Tires: Designated M & S (mud and snow). And are S, T, H or V speed-rated. These tires, in 60, 65,70 and 75 series aspect ratios, offer improved handling and the look of performance tires but with the smooth, quiet ride better suited to passenger cars. Because Standard Touring tires set greater importance on ride comfort and treadwear than Grand Touring tires they tend to be available in taller aspect ratio sizes with lower speed ratings.
Grand Touring Tires: Designated M & S (mud and snow). And are H, V, or Z speed-rated. Grand Touring tires are frequently installed on new vehicles as original equipment. They have excellent handling capability -- but still providing a smooth ride -- and are designed for higher operating speeds than Standard Touring tires. These tires have low 50, 55, 60 and 65-series aspect ratios.
All Season Performance Tires: M & S-designated with S or T speed rating. Designed to replace standard passenger tires but adding a handsome look with bold, black or white lettering. Expect good response and handling with all-season traction. Available in 55, 60, 65 and 70 series aspect ratios.
M & S-designated with U or H speed rating. 60 series and lower. Designed for traction in light snow conditions. Specially formulated compounds remain flexible in cold weather while computerized tread designs provide good traction and excellent handling in all weathers.
Winter Tires: Aggressive tread patterns are designed for outstanding traction in snow and ice. Tread compounds are usually somewhat 'stickier' than found on All-season or Performance tires. Tend to wear faster than All-season tires when used in warm, dry conditions due to increased siping in the tread patterns.
Light Truck & SUV Highway Rib Tires: Developed primarily for the highway. Straight, circumferential rib design provides consistent, even wear, low noise and a pleasing, smooth ride.
Light Truck & SUV Highway All-Season Tires: Small tread-blocks provide the ride qualities of a passenger tire for the highway but provide, also, traction on gravel, sand and moderate snow.
Light Truck & SUV Off-Road, All-Terrain Tires: Designed for competent highway performance with off-road capability. Multi-faceted tread blocks provide 'bite' against front and sideways forces and will perform well on gravel, sand, mud and snow. Tend to be somewhat noisier and harsher than highway tires
轮胎规格，是轮胎几何参数与物理性能的标志数据。形象的说，就是车子所穿的四只鞋子的大小，鞋底的设计如何，是适合慢跑还是快跑。不同规格的轮胎对于整车的性能表现以及舒适性都会产生影响。
国际标准的轮胎规格，一般由六部分组成，“轮胎宽度（mm）+轮胎断面的扁平比（%）+轮胎类型代号+轮辋直径（英寸）+负荷指数+许用车速代号”。轮胎宽度、轮辋直径及扁平比为胎厚与胎宽的百分比。
轮胎宽度，是影响整车油耗表现的一个因素。轮胎的越宽，与地的接触面积越大，相应的就增加了轮胎与地面的摩擦力，车辆的动能转化为摩擦热能而损失的能量会增加，如若行驶相同距离时宽胎就更容易耗油。不过事物都有它的两面性，虽然油耗增加，但宽胎的抓地力要更强，进而也将获得更好的车身稳定性。
扁平比，是影响车辆对路面的反应灵敏度的主要因素。扁平比越低的车辆，胎壁越薄，且轮胎承受的压力亦越大，其对路面的反应非常灵敏，从而能够迅速把路面的信号传递给驾驶者，更便于操控，多见于一些以性能操控见长的车型。扁平比越高，胎壁越厚，虽然拥有充裕的缓冲厚度，但对路面的感觉较差，特别是转弯时会相对更为拖沓，多见于一些以舒适性见长的车型。还有就是越野车的扁平比一般较高，主要是为了适应环境恶劣的路况。
车型的轮胎扁平比参数对比
车型 扁平比
保时捷911 35，40
丰田凯美瑞 55，60
吉普牧马人 75
轮胎类型代号，常见的表示有“X”高压胎，“R”、“Z”子午胎，“一”低压胎。市场上的轿车一般采用子午线轮胎，且目前已经实现了子午线轮胎无内胎，俗称“原子胎”。这种轮胎在高速行驶中不易聚热，当轮胎受到钉子或尖锐物穿破后，漏气缓慢，可继续行驶一段距离。另外，原子胎还有简化生产工艺，减轻重量，节约原料等好处。
负荷指数是把一条轮胎所能承受的最大负荷以代号的形式表示，来表征轮胎承受负荷的能力，数值越大，轮胎所能承受的负荷也越大。负荷指数及对应承载质量列表如下。
负荷指数及对应承载质量列表
负荷指数 71 72 73 74 75 76 77 78 79 80
承载质量（kg) 345 355 365 375 387 400 412 425 437 450
负荷指数 81 82 83 84 85 86 87 88 89 90
承载质量（kg) 462 475 487 500 515 530 545 560 580 60
负荷指数 91 92 94 95 95 96 97 98 99 100
承载质量
（kg) 615 630 650 670 690 710 730 750 775 800
备注：本表中的负荷指数仅为一部分
许用车速表示对车辆速度的极限限制，超过可能引起爆胎，速度级别越高，轮胎设计及对材料的要求也就越高。许用车速等级列表如下所示：
许用车速标识对应许用车速
许用车速标识 N P Q R S T U H V W Y
对应许用车速（km/h） 140 150 160 170 180 190 200 210 240 270 300
备注：(1)S、T、H为许用车速常见等级，上表为部分许用车速标识；
(2)许用车速标识Z，表示许用车速为240km/h或高于240km/h。如许用车速ZR，对应的许用车速要大于240km/h；
(3)轮胎无速度标识，除非另有说明，一般认为最大安全速度为120KM/H；
轮胎规格表示实例：轮胎规格为195/65R15 91V，其中195表示轮胎的宽度为195mm；65表示轮胎的断面高度与宽度的百分比为65%，即轮胎的扁平比；“R”代表单词RADIAL，表示是子午轮胎；15表示轮辋的直径为15英寸；91表示负荷指数；V则表示轮胎的许用车速等级 不错，记号 轮胎规格表示实例：轮胎规格为195/65R15 91V，其中195表示轮胎的宽度为195mm；65表示轮胎的断面高度与宽度的百分比为65%，即轮胎的扁平比；“R”代表单词RADIAL，表示是子午轮胎；15表示轮辋的直径为15英寸；91表示负荷指数；V则表示轮胎的许用车速等级
就看这一点点就可以了 年限非常重要 相当不错，感谢无私分享精神！ 找到好贴不容易，我顶你了，谢了 非常不错 非常有用啊 不错不错