• Toyo: The brand name of the tire manufacturer.
• 255/70R22.5: This indicates the tire size in millimeters. Specifically:
  • 255 is the width of the tire tread in millimeters.
  • 70 is the aspect ratio of the tire's sidewall height to its width. In this case, the sidewall height is 70% of the tire's width.
  • R indicates it is a radial tire.
  • 22.5 is the diameter of the wheel rim in inches that this tire is designed to fit.
• 16PR: Stands for 16 ply rating, which refers to the load-carrying capacity of the tire. PR stands for "ply rating," although modern tires do not necessarily have actual plies like older tires did.
• 140/137M: This is the load index and speed rating of the tire:
  • 140 is the load index, indicating the maximum load capacity of the tire. In this case, 140 means a maximum load capacity of 2,800 kg per tire.
  • 137 is the load index for dual fitment (when used in dual pairs), indicating a maximum load capacity of 2,730 kg per tire.
  • M is the speed rating, indicating the maximum speed at which the tire can carry a load corresponding to its load index. M corresponds to a maximum speed of 130 mph or 210 km/h.
• M122: This is the model or pattern name of the tire within Toyo's product lineup.

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