It is possible that the damage caused by transportation. I spoke wheels have been changed to a non-genuine, the battery may be the cause of the strength of the wheel.
It is possible that the damage caused by the transport. But the spokes has been changed, which does not use the original water may be responsible of not strong of the wheel.
It is possible that the damage caused by transport, but the wheels were changed, which do not use genuine centres may be causing an unhealthy of the wheels.