The letter is your speed rating, but what we're interested in is that number — the load index. A tire's load index, as the name suggests, indicates how much weight a tire can support when it's ...

On top of general durability, current ply ratings are also more a measure of a tire's perceived load range. In turn, higher ply ratings can also reflect a tire's ability to carry heavier loads in ...

it's unwise to have new tires with lower original load index ratings, as they will struggle to support the weight of your ...