What is the difference between 91v and 91h?
2 Answers
91v and 91h mainly differ in their speed ratings. 91 is the load index, indicating the load standard that the tire can bear under different air pressures. A tire with a load index of 91 can support 615KG at 2.5Bar. v and h are speed symbols, representing the maximum speed the tire can travel at, with v=240km/h and h=210km/h. Here is more information about speed ratings: 1. The speed rating indicates the maximum speed at which the tire can carry a specified load under defined conditions. 2. Different tires will have letters on their sidewalls representing the speed rating, which denotes the certified speed rating of the tire from 4.8 km/h to 300 km/h.
I've been driving for decades and am quite familiar with tire specifications. Both 91V and 91H have a load index of 91, meaning they can bear 615 kilograms, but there's a big difference in speed. V represents a maximum speed of 240 km/h, while H only goes up to 210 km/h—a 30 km difference. For regular driving, the difference isn't significant, but at high speeds, H tires are more prone to overheating and deformation, whereas V tires are more stable. I recommend checking your car's manual when choosing tires—don't mix and match randomly, safety comes first. A blowout on the highway is no small matter, especially during summer when temperatures are high and roads are slippery. Spending a bit more for peace of mind is much cheaper than replacing tires or repairing your car. Remember, tires are your car's feet—maintain them well to go the distance.
