Is the Baby Jogger Summit X3 compatible with the Chicco KeyFit 35?

Yes, with an adapter. Chicco KeyFit fits Summit X3 via the Baby Jogger Chicco/Peg Perego adapter.

DetailValue
StrollerBaby Jogger Summit X3
Car seatChicco KeyFit 35
VerdictYes, with an adapter
Adapter requiredBaby Jogger car seat adapter (Chicco/Peg Perego)
Check price: Baby Jogger Summit X3 Get the adapter: Baby Jogger car seat adapter (Chicco/Peg Perego) Check price: Chicco KeyFit 35

FAQ

What adapter do I need to fit the Chicco KeyFit 35 on the Baby Jogger Summit X3?

You need the Baby Jogger car seat adapter (Chicco/Peg Perego). Once fitted, the Chicco KeyFit 35 clicks onto the Baby Jogger Summit X3 frame.

Is the Chicco KeyFit 35 compatible with the Baby Jogger Summit X3?

Yes, with an adapter.

Other seats for this stroller

Other strollers for this seat

Source: Summit X3 compatibility guide (Strolleria). Verified 2026-08-21.