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A letter naming a maximum sustained speed.
Also known as: Speed symbol tyre, Speed index
A tyre's speed rating is a letter — T, H, V, W, Y — each keyed to a maximum sustained speed. The sequence is not alphabetical in effect: H sits between U and V rather than where the alphabet would place it, a historical accident from when H was the top rating.
States the maximum sustained speed a tyre is rated for, as a letter keyed to a published table.
Contexts: Vehicle dashboard, Packaging
Is not in alphabetical order of speed, since H was once the highest rating and later ratings were added around it rather than after it.
Contexts: Vehicle dashboard, Packaging
A single capital letter moulded into a tyre sidewall immediately after the load index.