Baby Jogger The Baby Jogger Car Seat Adaptor is one of the most important accessories you will ever purchase for your stroller. It is designed to fit several popular car seats including, Peg Perego Primo Viaggio, Britex Companion, and most Graco and Evenflo models. Compatible with any City Series, Performance Series or Q-Series single strollers. Car Seats Adaptors are model year specific.