Chicco Car Seat Adapter for Vista Stroller

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Hi! I have the Chicco KeyFit car seat that has the 22 lbs weight limit (the one you get with their travel system). I noticed that the Chicco adapter for the Vista stroller is for the KeyFit 30. Is there much of a difference in the shape of the two? Will my KeyFit 22 fit the in the adapter? TIA!

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Just got my question answered by Chicco's Customer Service. If the KeyFit (22) was manufactured after October 2007 then it has the same shape/dimensions as the KeyFit 30. She said the difference between the two is the material they use to be able to hold more weight otherwise they are the same and will take the same base. I hope this helps anyone else with the same situation.