Sport buggy recommended minimum age 6 months pushchair weight 135 kg reversible seat harness system 5 point safety harness slider adjustable series concord wanderer wheel settings swivelling lockable wheel type eva tyres number of wheels 4 safety bar with bumper bar footrest adjustable dimensions 104 x 60 x 107 cm dimensions folded 69 x 50 x 39 cm colour black included in delivery canopy rain cover shopping bag bumper bar application city