Opel Speedster Operation, Safety, Maintenance Manual page 88

Weights, payload and roofload
The payload is the difference between the
permissible gross vehicle weight and the EC
kerb weight.
The combined total of front and rear axle
loads (see vehicle identification plate) must
not exceed the permissible gross vehicle
weight, i.e. if the front axle load is being fully
utilized, the rear axle load must not be such
that the permissible gross vehicle weight is
exceeded.
Optional equipment and accessories increase
the kerb weight and in some cases also the
permissible gross vehicle weight, which
means that the payload will also change
slightly.
Note the weights given on the vehicle
identification plate.
Roof loads must not be carried on the
Speedster.
Driving hints page 44.
Vehicle weights (kg)
Model Permissible
Speedster 1
1 According to EC Directive, including
(tank 90% full).
gross Kerb
vehicle weight
150 945
assumed weights for driver (68 kg), luggage (7 kg) and all fluids
weight 1
87