What does 88H on a tire mean?

2 Answers
Reyes
08/30/25 4:25am
The 88 in tire 88H represents the load index, while the H indicates the speed rating of the tire, which means the tire is suitable for safe driving at speeds below 210 km/h. Here are the relevant details: 1. The load index is molded on the sidewall of the tire, indicating the maximum load capacity of the tire. For driving safety, this load limit should not be exceeded. Overloading a tire may cause excessive heat buildup and lead to sudden failure. The speed rating indicates the maximum speed at which the tire can carry a specified load under defined conditions. Every tire has a designed critical speed. When driving at high speeds reaches this critical speed, the tire may exhibit a 'standing wave' phenomenon, which is the tire's 'critical speed.' Continued use under such conditions increases the risk of tire blowouts. For safety reasons, tires should not be used beyond their designed speed limits. 2. The speed rating of a tire refers to the maximum speed at which the tire is allowed to operate, usually represented by uppercase letters and marked on the tire's sidewall. Different letters correspond to different speed ratings. For example, 'L' indicates a maximum allowable speed of 120 km/h, 'T' represents 190 km/h, and 'V' stands for 240 km/h. Generally, higher-end vehicles use tires with higher speed ratings. However, the speed rating of a tire may decrease over time due to aging and reduced elasticity. Tire pressure also affects the speed rating—lower pressure results in a lower speed rating.
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JocelynLynn
09/11/25 8:25am
I was curious about the 88H marking on my tire, so I asked my mechanic friend. He explained that 88 is the load index, meaning each tire can bear a maximum of 545 kg, and H is the speed rating indicating a top safe speed of 210 km/h. These aren't arbitrary numbers but international standards ensuring driving safety. Overloading or speeding can cause blowouts, especially dangerous on highways. I recall a long trip where the tires were overloaded—the handling felt unstable, and I made sure to check this number when replacing them later. When choosing new tires, always consult your vehicle's manual to match the car's weight and driving habits, as mismatches affect handling and fuel efficiency. Regular maintenance should include tire pressure checks since under- or over-inflation impacts load capacity—key to extending tire lifespan.
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