Cybex Aton G vs Chicco KeyFit 30

Both are infant car seats — here are their published manufacturer specs side by side.

This compares published manufacturer specs — not safety or fit advice. The seat's manual, your vehicle's manual, NHTSA's tools and a certified CPST are the fit-and-safety authority; always check them before installing.

Spec	Cybex Aton G	Chicco KeyFit 30
Stage	Infant	Infant
Narrow (3-across)	–	✓
Extended rear-facing	–	–
FAA-approved	✓	✓
Lightweight / travel	✓	✓

Cybex Aton G

4–35 lb

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Chicco KeyFit 30

4–30 lb

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As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Weight ranges are the manufacturer's published limits across all modes.

How they differ

the Chicco KeyFit 30 is listed narrow (roughly ≤17″) for fitting three across a back seat; the Cybex Aton G isn't listed narrow

Published limits

Mode	Cybex Aton G	Chicco KeyFit 30
Rear-facing	4–35 lb · 17–32 in	4–30 lb
Useful life	—	6 yrs from manufacture

Cybex Aton G: Rear-facing-only infant carrier: for children 4–35 lb and 17–32″. Useful life is set by the printed "Expires On" date on the seat and base (no printed number of years in the manual).

Chicco KeyFit 30: Rear-facing-only infant carrier: for children 4–30 lb and 30″ or less (printed limit).

Printed verbatim in the manufacturer's manual (Cybex Aton G Infant Car Seat Owner's Manual · Chicco KeyFit 30 (03/2020)); “—” = not published for that mode, “not yet sourced” = we haven't read that manual yet, not that the seat has no limit. How we source these →

Recall record

Cybex — 4 on NHTSA's record · Chicco — 2 on NHTSA's record.

That is the record of the brand — not a verdict on these models. A recall names specific models and manufacture-date ranges, and a seat missing from the record is not "recall-free": check nhtsa.gov/recalls with the model and date of manufacture on your seat's label. Source: NHTSA, retrieved 2026-09-05.

Where to buy

Cybex Aton G

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Chicco KeyFit 30

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FAQ

What's the difference between the Cybex Aton G and the Chicco KeyFit 30?
The Cybex Aton G is FAA-approved for aircraft, lightweight/travel; the Chicco KeyFit 30 is narrow for 3-across, FAA-approved for aircraft, lightweight/travel. Both are infant car seats.

Which fits three across, the Cybex Aton G or the Chicco KeyFit 30?
The Chicco KeyFit 30 is listed narrow (~≤17″) for 3-across; the Cybex Aton G isn't. Three-across fit still depends on your exact vehicle — confirm before buying.

Which is right for my car and child, the Cybex Aton G or the Chicco KeyFit 30?
That depends on your specific vehicle and child — this page compares published manufacturer specs only, not fit or safety. Check the seat manual, your vehicle manual, NHTSA's car-seat finder and ideally a certified CPST before deciding.

Citing these specs? Go ahead — published manufacturer data, last verified 2026-06-11. Copy a ready-made reference:

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