For the average individual, the meaning of speed symbols and load indexes on automotive tyres are not common knowledge. This makes sense, as most passenger cars with the correctly chosen tyres won’t ever come close to the maximum speed or weight capacity indicated on the tyres. It is represented by a letter found on the sidewall of the tyre, following the tyre size and load index. The speed index is an important consideration as it ensures that the tyre is suitable for the speed capabilities of the vehicle.