Sport buggy recommended minimum age new born pushchair weight 106 kg reversible seat harness system 5 point safety harness slider adjustable series concord neo wheel settings swivelling lockable wheel type solid rubber tyres number of wheels 4 safety bar with bumper bar footrest not adjustable dimensions 84 x 61 x 110 cm dimensions folded 74 x 61 x 39 cm included in delivery canopy rain cover shopping bag bumper bar application city