Can the original 91H tires be replaced with 87V ones?
2 Answers
The original vehicle weight is within the allowable range for tire replacement, and mixed use is possible. The following is extended content: Meaning of tire codes: 91 is the load index, indicating the standard load that the tire can bear under different air pressures. A 91-rated tire can bear 615KG at 2.5Bar. H represents a maximum speed of 210. Introduction to tires: Tires are round, elastic rubber products installed on various vehicles or machinery for rolling on the ground. They are usually mounted on metal rims to support the vehicle body, cushion external impacts, achieve contact with the road surface, and ensure the vehicle's driving performance. Tires are often used under complex and harsh conditions, enduring various deformations, loads, forces, and high and low temperatures during operation. Therefore, they must have high load-bearing capacity, traction performance, and cushioning performance.
I see you're asking about replacing 91H tires with 87V ones. That's not safe at all. The original 91H load index of 91 means each tire can carry a maximum of 615 kg of vehicle weight. If you switch to 87V with a load rating of 87, it's only 545 kg per tire—a difference of 70 kg. In my many years as a mechanic, I've seen numerous cases of tire blowouts after such replacements, especially when the car is fully loaded or carrying heavy luggage. The tires can't handle the burden and are prone to bulging or cracking. While the speed rating V can go up to 240 km/h compared to H's 210 km/h, driving slower isn't the main issue—the real risk lies in insufficient load capacity. It's much safer to stick with the original specifications. Don't cut corners to save money and end up with a major problem.
