Hi there! We're here to help you decide between the Graco SlimFit3 LX 3-in-1 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
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |
Type |
Convertible Rear-Facing Forward-Facing High Back Booster |
Convertible Rear-Facing Forward-Facing |
Current price |
Currently unavailable
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Currently unavailable
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Rating | 4.90 | 4.40 |
Our Thoughts
When it comes to choosing a car seat that offers versatility across various stages of your child’s growth, both the Graco SlimFit3 LX 3-in-1 and the UPPAbaby Knox stand as formidable options. Each seat has its distinct strengths and weaknesses, so deciding between the two mainly depends on what you prioritize most as a parent.
The SlimFit3 LX truly stands out with its 3-in-1 convertible feature, designed to cater to kids from infancy up to the booster stage. This eliminates the need to purchase multiple car seats as your child ages. The SlimFit3 LX supports a rear-facing harness for weights between 5-40 lbs. When your child is ready, you can switch to a forward-facing harness for 22-65 lbs, and eventually convert to a high-back booster for 40-100 lbs. The SlimFit3 LX features a slim profile, perfect for tight backseats and ideal if you need to fit three car seats side by side. Safe and sturdy, it uses a steel-reinforced frame combined with ProtectPlus engineering. However, some potential drawbacks include unclear installation instructions and possibly insufficient support for newborns or infants.
On the other hand, the UPPAbaby Knox offers a sleek, luxurious design that will appeal to parents who value aesthetics in their car accessories. It is a convertible seat suitable for both rear-facing and forward-facing configurations, accommodating children from birth up to 65 pounds. The Knox comes with high-end materials and premium features like integrated Koroyd technology and Side Impact Pods for added safety. However, it's critical to consider the Knox's limitations, the foremost being its size. Its premium build results in added bulk, which may not fit smaller cars or tight backseats comfortably. Furthermore, it appears that several parents found the installation process quite cumbersome.
Between the two seats, both offer safety and functionality, albeit in different measures. If you require a car seat that provides long-lasting utility, accommodating the progressive growth stages of your child, the SlimFit3 LX makes a stronger case. Its compact design, ease of adjustment, and rigorous safety testing make it an excellent choice for parents. Additionally, it has the added advantage of being machine washable, which is a plus point on the practicality front.
However, if luxury and aesthetics are your top priority and you have a larger car to support its size, the UPPAbaby Knox could be a solid investment. It offers enhanced safety metrics and a stylish build that is hard to match. Just bear in mind the installation challenges and space requirements that come with it.
In any case, both car seats have been approved for travel in forward-facing and rear-facing configurations, meaning they offer reliable child security during travel. My recommendation would be the Graco SlimFit3 LX for most parents, owing to its adaptable utility, reliable safety features, and reasonable price-point compared to the Knox. However, for those who can afford the splurge and have the space in their vehicle, the Knox certainly offers a level of aesthetic and quality that is undeniably appealing.
Key Details
SlimFit3 LX 3-in-1 | Knox | |
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Brand | Graco | UPPAbaby |
Type |
Convertible Rear-Facing Forward-Facing High Back Booster |
Convertible Rear-Facing Forward-Facing |
Weighted Rating | 4.90 | 4.40 |
1 yr Price Range | $195.99 - $279.99 | $299.99 - $349.99 |
Current price |
Currently unavailable
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Currently unavailable
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Value |
![]() The price point is moderate considering its 3-in-1 capability and longevity from infant to booster stage. |
![]() The Knox is priced at the higher end of the market without corresponding enhancements in convenience or functionality. |
Safety |
![]() With its steel-reinforced frame and ProtectPlus engineering, it exceeds standard safety expectations. |
![]() Features like integrated Koroyd technology and Side Impact Pods offer advanced safety beyond standard requirements. |
Features |
![]() The car seat includes a no-rethread harness, multiple recline positions, and dual cup holders, adding convenience. |
![]() 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 |
![]() The installation process is standard, with no specific enhancements that simplify it significantly. |
![]() Installation challenges are frequently noted, which could be a significant deterrent for parents who need to move the seat between vehicles. |
Cleaning |
![]() The Rapid Remove cover is machine-washable, facilitating easy cleanup. |
![]() The machine-washable fabric is a convenient feature, allowing for easier maintenance and cleanliness. |
Size |
![]() The slim profile is ideal for fitting three across in the backseat, a rare attribute in car seats. |
![]() 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 Graco SlimFit3 LX 3-in-1 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
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |
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Height Range | 0 - 49 inches | |
Weight Range | 5 - 40 pounds | 14 - 45 pounds |
Forward-facing
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |
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Height Range | 0 - 49 inches | 0 - 49 inches |
Weight Range | 22 - 65 pounds | 25 - 65 pounds |
Booster
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |
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Height Range | 43 - 57 inches | |
Weight Range | 40 - 100 pounds |
Dimensions and Weight
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |
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Width | 19.9 inches | 18.8 inches |
Height | 25.5 inches | 32.5 inches |
Depth | 21.5 inches | 23.8 inches |
Weight | 21.5 pounds | 32.5 pounds |
Core Specifications
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |
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Model Year | 2022 | 2022 |
Made In | China | China |
Frame Material | Reinforced Steel | Koroyd Technology |
Safety and Compliance
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |||||||||||||||||||||
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Federal Safety Standards | Meets all standards | Meets all standards | ||||||||||||||||||||
Configurations FAA-Approved for Airplanes |
Forward-Facing Rear-Facing High Back Booster |
Forward-Facing Rear-Facing |
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NHTSA Ease-of-Use Ratings | Not rated by NHTSA. |
Rear-Facing Mode
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Previous Recalls | This car seat has never been recalled. | This car seat has never been recalled. |
Features
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |
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Attachment Methods |
LATCH Seatbelt |
LATCH Seatbelt |
Harness Type | 5-Point | 5-Point |
Cup Holders | Has cup holders. | Has cup holders. |
Warranty and Durability
Graco SlimFit3 LX 3-in-1 | UPPAbaby Knox | |
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Manufacturers Warranty Length | 1 year | 2 years |
Lifespan | 10 Years | 10 Years |
Additional Links
See all Graco car seats | See all UPPAbaby car seats |
Full review of the Graco SlimFit3 LX 3-in-1 Full review of the UPPAbaby Knox |