The city go car seat adapter is the easiest way toturn your pushchair into a complete travel systemattaching your car seat to your baby joggerpushchair has never been easier with a fewsimple steps and no tools needed compatible with city mini single citymini gt single city mini 4 wheel cityelite and the summit x3features benefits convert your pushchair into a travel system withthese adapters designed to fit the baby jogger city go car seat easy to fit quick to release and easy to remove