Tandem pushchair recommended minimum age new born pushchair weight 156 kg reversible seat carrycots pushchair seat second seat harness system 5 point safety harness slider adjustable handlebar height 97 104 cm wheel settings swivelling lockable wheel type air chamber wheels wheel diameter rear 26 cm wheel diameter front 18 cm number of wheels 4 safety bar with bumper bar footrest adjustable dimensions 104 x 61 x 111 cm dimensions folded 1