Vauxhall Insignia Owner's Manual page 85

Storage 83
detrimental effect on vehicle
handling due to the vehicle's
higher centre of gravity.
Distribute the load evenly and
secure it properly with retaining
straps. Adjust the tyre pressure
and vehicle speed according to
the load conditions. Check and
retighten the straps frequently.
Do not drive faster than 75 mph.
The permissible roof load is
100 kg. The roof load is the
combined weight of the roof rack
and the load.