| Code de modèle | Description | |
|---|---|---|
| 01 | 957.541, 957.542, 957.543, 957.653, 957.654, 957.656, 957.657, 957.661, 957.662, 957.663, 957.664, 957.681, 957.682 | ESSIEU AV |
| 02 | 957.541, 957.542, 957.543, 957.653, 957.654, 957.656, 957.657, 957.661, 957.662, 957.663, 957.664, 957.681, 957.682 | ESSIEU NON PROPULSIF |