ELECTRO-hydraulic (an electric motor drives a hydraulic pump) power-assisted rack and pinion steering is standard on all Astra models. The steering wheel on the convertible is a leather-wrapped, three-spoke item with a full-size airbag that is adjustable for rake and reach. With an identical wheelbase to the rest of the Astra range (2606mm), the convertible also has the same turning circle of 10.3 metres, which is measured from kerb to kerb. The steering wheel takes 3.0 turns to rotate from lock to lock.