Car seat adapters, such as those available for the Stokke® Xplory® stroller, are not available for the Stokke® Crusi™ stroller. The reason for this is that the car seat brands which are compatible with Stokke® car seat adapters have harnesses exposed at the back side. This would present a safety concern when such a car seat is used in the sibling configuration of the Stokke® Crusi™ stroller, as the child seated in the lower seat could grab on to the car seat harness.
As a car seat solution for the Stokke® Crusi the Stokke® iZi Go™ or iziSleep™ car seats are available. The harnesses on these models are concealed and safe for use when a child is seated below it in the Crusi™ Sibling Seat. Everything we do is in the best interest of the child and sometimes that does pose limits to the compatibility of our products with products or product components from other manufacturers.