SeatFitFindercar seats, by spec

Graco RightGuide Portable vs Nuna AACE

Both are booster 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.

SpecGraco RightGuide PortableNuna AACE
StageBoosterBooster
Narrow (3-across)✓–
Extended rear-facing––
FAA-approved––
Lightweight / travel✓–

Graco RightGuide Portable

50–120 lb

See price on Amazon

Nuna AACE

40–120 lb

See price on Amazon

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

Published limits

ModeGraco RightGuide PortableNuna AACE
Booster (with back)—40–110 lb · 38–60 in · 4+ yrs
Booster (backless)50–120 lb · 43–60 in · 5+ yrs50–120 lb · 38–60 in · 5+ yrs
Useful life10 yrs from manufacture10 yrs from manufacture

Graco RightGuide Portable: A portable seat-belt-positioning trainer (no shell/back): for children 50–120 lb, 43–60″, 5+ yrs — printed verbatim as the RightGuide™ Seat Belt Trainer mode.

Nuna AACE: Belt-positioning booster convertible between high-back and backless mode — the two modes have genuinely different weight floors and minimum ages (high-back: 40 lb / 4y+; backless: 50 lb / 5y+), same height range for both. Do not use if more than 10 years old (printed number, per manual).

Printed verbatim in the manufacturer's manual (NWL0000792167A · Nuna AACE Booster Seat User Manual); “—” = 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

Graco — 17 on NHTSA's record · Nuna — 1 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

Graco RightGuide Portable

See price on Amazon

Nuna AACE

See price on Amazon

Need it before the due date or a trip? Amazon Prime includes fast delivery on eligible items, and eligible new members may be offered a free trial. Delivery speed and return terms vary by item, so check the listing in case a seat may not fit your car. See if you can try Prime free →

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As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Affiliate links never affect our specs or which seats we compare.

FAQ

What's the difference between the Graco RightGuide Portable and the Nuna AACE?
The Graco RightGuide Portable is narrow for 3-across, lightweight/travel; the Nuna AACE lists none of the narrow / extended-rear-facing / FAA / lightweight flags. Both are booster car seats.

Which fits three across, the Graco RightGuide Portable or the Nuna AACE?
The Graco RightGuide Portable is listed narrow (~≤17″) for 3-across; the Nuna AACE isn't. Three-across fit still depends on your exact vehicle — confirm before buying.

Which is right for my car and child, the Graco RightGuide Portable or the Nuna AACE?
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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