Graining is a surface-level tyre defect caused by excess heat on the tread, which tears small strips of rubber away and re-fuses them into a rough, sandpaper-like texture that reduces grip. Graining is often recoverable if the driver adjusts their pace and allows the tyre to re-enter its operating window. Blistering is a deeper structural defect caused by overheating within the tyre’s carcass, which softens the bonds between internal rubber laye…
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