Difference: Different load capacities.

The load capacity of each 91V tire is 615kg;

The load capacity of each 85V tire is 515kg.

The numbers 91 and 85 represent the tire load index, and v represents a tire speed of 240 km/h.

The speed rating of the tire is indicated by English letters on the sidewall of the same tire. Representing the certified speed level of tires from 4.8 kilometers per hour to 300 kilometers per hour. The load index represents the maximum upper limit load of this tire, which cannot be exceeded for driving safety.