How deep is the sidewall scratch allowed for Michelin tires?

[DelKing]

For scratches that are not severe and do not damage the cord layer, meaning the tire's structure is not compromised by the scratch and there is no air leakage, repair or replacement may not be necessary. However, for safety reasons, it is still advisable to have the tire inspected at a professional repair shop and perform a dynamic balance test on the wheel with sidewall scratches. Below are some precautions regarding tire purchase and usage: 1. When purchasing tires, always check the production date: Avoid buying tires with production dates that are too old. Tires are rubber products and can age even if not used. 2. During regular use, frequently check tire pressure and the surface for any damage: The tire sidewall is relatively fragile, and if it is cut or punctured, it cannot be repaired. It is recommended that car owners replace their tires every four years, even if the mileage driven within those four years is low.