Combi pushchair recommended minimum age new born pushchair weight 16 kg carrycots carrycot pushchair seat backrest 4 positions harness system 5 point safety harness slider adjustable handlebar height 110 cm series knorr baby voletto wheel settings swivelling lockable wheel type pneumatic tyres number of wheels 4 footrest adjustable dimensions 110 x 106 x 43 cm included in delivery pushchair seat chassis carrycot baby changing bag footmuff parasol