3 wheeler pushchair aluminium frame air tyres quick release wheels recommended minimum age new born pushchair weight 95 kg harness system 5 point safety harness slider adjustable handlebar height 78 106 cm series mountain buggy swift wheel settings swivelling lockable wheel type pneumatic tyres wheel diameter rear 25 cm wheel diameter front 25 cm number of wheels 3 safety bar with bumper bar footrest not adjustable included in delivery cano