3 wheeler pushchair recommended minimum age 6 months pushchair weight 87 kg reversible seat frame material aluminium carrycot pushchair seat with adapter brakes locking brake canopy with sun protection harness system 5 point safety harness suspension slider not adjustable handlebar height 102 cm folding mechanism collapsible wheel settings swivelling lockable wheel type solid rubber tyres number of wheels 3 recommended maximum age 35 years max