3 wheeler pushchair recommended minimum age new born pushchair weight 73 kg canopy viewing window sunshade harness system 5 point safety harness slider adjustable wheel settings swivelling lockable wheel type eva tyres number of wheels 3 footrest adjustable dimensions 103 x 59 x 98 cm dimensions folded 28 x 59 x 77 cm included in delivery canopy with view window sunshade shopping bag