Hi there! We're here to help you decide between the Nuna aace and the UPPAbaby Knox.
Our goal is to provide you with the information you need to feel confident that you're choosing the optimal car seat for your family's needs and budget. Let us know if you have any other questions!
At A Glance
Nuna aace | UPPAbaby Knox | |
Type | High Back Booster |
Convertible Rear-Facing Forward-Facing |
Current price |
Currently unavailable
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Currently unavailable
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Rating | 4.57 | 4.40 |
Our Thoughts
As a busy parent, selecting the right car seat for your child can be a daunting task. So let's pare down some choices, starting by comparing two high-quality options: the Nuna AACE and the UPPAbaby Knox.
The Nuna AACE is a versatile, premium booster seat designed with comfort and growth in mind. Specifically tailored for children from 4 years old and up, the AACE transitions from a high back to a backless booster as your child grows. It supports a weight range of 40-110 pounds in the high-back mode and 50-120 pounds in the backless mode. One of the standout features of the AACE is its adjustability. It has a 3-D growth system that adjusts in depth and height, allowing the seat to adapt as your child grows. The seat is also lauded for its advanced safety features like side-impact protection pods and energy-absorbing foam. While the AACE may be on the pricier end, its durability, quality, and the long-term usability it provides make it a worthwhile investment.
On the other hand, the UPPAbaby Knox is a premium convertible car seat that can accommodate newborns up to 65 pounds. It offers rear and forward-facing options, which allows for the seat to grow alongside your child. It features unique safety enhancements, like the integrated Koroyd technology and Side Impact Pods, which go beyond standard requirements to keep your little one secure in various situations. Despite its high-end aesthetic appeal, the Knox has been noted to have practical limitations, especially for parents who frequently switch between rear and forward-facing orientations. Moreover, the installation process of the Knox can be difficult, and the seat's larger size may not be suitable for smaller vehicles.
While both seats are quality choices, they cater to different family needs and budgets. For those willing to invest in a long-term, versatile and safety-conscious booster seat for their school-aged child, the Nuna AACE is a fantastic option. Its emphasis on adjustability ensures a custom fit for your child as they grow, and the ease of installation makes life a little less complicated for busy parents.
However, for those in need of a convertible seat from birth, despite its slightly higher price and challenges with installation, the UPPAbaby Knox offers a stylish and substantial option. The seat comes packed with added safety features and offers the flexibility of both rear and forward-facing positions, providing a better fit for those with larger cars and less frequent need for transition.
Ultimately, ensure to consider your child's age, weight, growth rate, car size, and your budget when making a decision. Both seats have their strengths, and the deciding factor will largely depend on what your unique family needs are.
Key Details
aace | Knox | |
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Brand | Nuna | UPPAbaby |
Type | High Back Booster |
Convertible Rear-Facing Forward-Facing |
Weighted Rating | 4.57 | 4.40 |
1 yr Price Range | $250 - $250 | $299.99 - $349.99 |
Current price |
Currently unavailable
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Currently unavailable
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Value |
![]() The AACE, while on the pricier side, offers exceptional durability and quality, justifying its cost with long-term usability and high resale value. |
![]() The Knox is priced at the higher end of the market without corresponding enhancements in convenience or functionality. |
Safety |
![]() This seat boasts advanced safety features like energy-absorbing foam, side-impact protection pods, and a belt positioner, ensuring enhanced security. |
![]() Features like integrated Koroyd technology and Side Impact Pods offer advanced safety beyond standard requirements. |
Features |
![]() Its 3-D growth system, multiple recline options, and no added fire-retardant chemicals mark it as a feature-rich option. |
![]() While the chest clip's one-button release and the machine-washable fabric are nice, they don't set the Knox apart in a crowded market. |
Installation |
![]() Users find the installation process straightforward, thanks to its adjustable latch connectors and clear instructions. |
![]() Installation challenges are frequently noted, which could be a significant deterrent for parents who need to move the seat between vehicles. |
Cleaning |
![]() The seat's machine-washable fabric and easy disassembly for cleaning add to its practicality. |
![]() The machine-washable fabric is a convenient feature, allowing for easier maintenance and cleanliness. |
Size |
![]() While not the smallest booster, its design is space-efficient, offering ample room for growth without being overly bulky. |
![]() Its premium build comes with added bulk, making it less suitable for smaller vehicles or those needing to fit multiple seats. |
Review | Click here | Click here |
Comparison of Specifications
While features and reviews provide a sense of real-world use, the specs offer quantifiable details on sizing, limitations, and more. Comparing key measurements and ranges side-by-side is crucial for ensuring you choose a seat properly fitted for your child and vehicle.
We've compiled the weight limits, height limits, dimensions, and other vital statistics for the Nuna aace and the UPPAbaby Knox. This data will confirm whether each seat can accommodate your child's current size and projected growth. Specs like seat depth and width are also important for assessing fit with your car's backseat.
Review the following key measurements for both seats. Pay special attention to the height and weight limits to ensure your child falls within the safe ranges.
Height and Weight Limits
Rear-facing
Nuna aace | UPPAbaby Knox | |
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Height Range | 0 - 49 inches | |
Weight Range | 14 - 45 pounds |
Forward-facing
Nuna aace | UPPAbaby Knox | |
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Height Range | 0 - 49 inches | |
Weight Range | 25 - 65 pounds |
Booster
Nuna aace | UPPAbaby Knox | |
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Height Range | 38 - 60 inches | |
Weight Range | 40 - 120 pounds |
Dimensions and Weight
Nuna aace | UPPAbaby Knox | |
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Width | 22.5 inches | 18.8 inches |
Height | 33.0 inches | 32.5 inches |
Depth | 15.0 inches | 23.8 inches |
Weight | 15.6 pounds | 32.5 pounds |
Core Specifications
Nuna aace | UPPAbaby Knox | |
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Model Year | 2021 | 2022 |
Made In | China | China |
Frame Material | Plastic | Koroyd Technology |
Safety and Compliance
Nuna aace | UPPAbaby Knox | |||||||||||||||||||||||||||||||
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Federal Safety Standards | Meets all standards | Meets all standards | ||||||||||||||||||||||||||||||
Configurations FAA-Approved for Airplanes |
High Back Booster Backless Booster |
Forward-Facing Rear-Facing |
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NHTSA Ease-of-Use Ratings |
Booster Mode
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Rear-Facing Mode
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Previous Recalls | This car seat has never been recalled. | This car seat has never been recalled. |
Features
Nuna aace | UPPAbaby Knox | |
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Attachment Methods |
Seatbelt |
LATCH Seatbelt |
Harness Type | N/A | 5-Point |
Cup Holders | Has cup holders. | Has cup holders. |
Warranty and Durability
Nuna aace | UPPAbaby Knox | |
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Manufacturers Warranty Length | 2 years | 2 years |
Lifespan | 10 Years | 10 Years |
Additional Links
See all Nuna car seats | See all UPPAbaby car seats |
Full review of the Nuna aace Full review of the UPPAbaby Knox |