| 摘要 |
The invention relates to a hub provided with standby wheel and a unit used for installing the said on the hub and preventing from leakage. The hub is comprised of a disk-like element and a ring-like element and is produced by firstly making a die casting configurated integrally with the two said elements and then cutting the same into the two elements. The standby wheel is installed on between the two elements, so as to keep vehicle running when the tyre staled. |
