Buggy recommended minimum age new born pushchair weight 95 kg reversible seat carrycot pushchair seat brakes locking brake harness system 5 point safety harness slider adjustable folding mechanism self standing umbrella fold wheel settings swivelling lockable wheel type solid rubber tyres wheel diameter rear 21 cm wheel diameter front 18 cm number of wheels 4 safety bar with bumper bar footrest adjustable dimensions 57 x 107 x 83 cm dimensi