Buggy recommended minimum age new born pushchair weight 72 kg frame material aluminium carrycot pushchair seat brakes locking brake harness system 5 point safety harness slider adjustable series maclaren techno xt folding mechanism collapsible wheel settings swivelling lockable wheel type solid rubber tyres number of wheels 4 max load 15 kg safety bar without bumper bar footrest adjustable dimensions 108 x 28 x 35 cm colour grey included in