Hi there! We're here to help you decide between the Diono Radian 3RXT Safe+ and the UPPAbaby Alta.
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
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |
Type |
Convertible Rear-Facing Forward-Facing High Back Booster Backless Booster |
High Back Booster |
Current price |
Currently unavailable
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Currently unavailable
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Rating | 4.58 | 4.59 |
Our Thoughts
If you're searching for a car seat that is adaptable to a variety of vehicle sizes, the Diono Radian 3RXT Safe Plus is a fantastic choice. This convertible car seat shines when it comes to safety; its robust set of features includes a steel-reinforced frame and EPS foam designed for side-impact protection. The slim design proves especially practical for families with multiple children, as it allows for the installation of up to three car seats across in most vehicles. However, it's important to note the complexity of installation and reassembly, which some might find significantly challenging. Plus, if your child is on the taller side for their age, it may be worth considering another option, as some parents have noticed size limitations in this regard.
On the other hand, the UPPAbaby Alta offers an accommodating blend of comfort and ease of use for older children transitioning from a forward-facing harness seat to a high-back booster. This model places an emphasis on proper belt positioning to ensure children are kept secure. The use of the manufacturer's rigid LATCH system has been praised by parents for its easy installation. In addition, users have raved about the roomy and padded design of this seat model, noting that it keeps their children comfortable during trips. Although, families with compact vehicles may want to take into consideration the broad base of this seat, which could potentially cramp smaller backseats.
With these factors in mind, both options present excellent utility depending on your needs. If you have a smaller vehicle or multiple younger children, the Diono Radian 3RXT Safe Plus would be a commendable choice due to its slim design and robust safety features. However, the Diono car seat's complexity in installation and reassembly, as well as its noted size limitation for older children, can make it a less attractive option for some families. On the contrary, if your child is older or if you have a larger vehicle, the UPPAbaby Alta could be the perfect fit. This high-back booster seat offers a distinctly spacious and comfortable design, making it ideal for bigger kids on longer journeys. However, the potential shoulder belt slipping issue and wide base may be drawbacks for families with smaller vehicles or who prioritize effortless seat adjustment.
Key Details
Radian 3RXT Safe+ | Alta | |
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Brand | Diono | UPPAbaby |
Type |
Convertible Rear-Facing Forward-Facing High Back Booster Backless Booster |
High Back Booster |
Weighted Rating | 4.58 | 4.59 |
1 yr Price Range | $259.99 - $349.99 | $179.99 - $179.99 |
Current price |
Currently unavailable
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Currently unavailable
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Value |
![]() Offers robust safety features and long-term usability, justifying its price. |
![]() Priced consistently at $179.99, it aligns with the market average for high-back boosters with similar features. |
Safety |
![]() Steel-reinforced frame and comprehensive protection measures are a standout. |
![]() It's generally well-regarded by users for safety. |
Features |
![]() The 12-position headrest and machine-washable cover add notable convenience. |
![]() Offers unique features like rigid LATCH connectors and a SecureFit belt routing system, which are not standard on all boosters. |
Installation |
![]() Installation and reassembly, especially of the seat cover, are noted as challenging. |
![]() Parents report easy installation, especially praising the rigid LATCH system, indicating a user-friendly experience. |
Cleaning |
![]() The machine-washable cover is practical, but reinstallation can be cumbersome. |
![]() The machine washable seat pad and removable cup holder are highlighted as positives for easy cleanup. |
Size |
![]() Its narrow design is ideal for fitting multiple car seats in a vehicle. |
![]() Its dimensions are standard for a high-back booster, accommodating the appropriate age and size range without being exceptionally compact or light. |
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 Diono Radian 3RXT Safe+ and the UPPAbaby Alta. 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
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |
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Height Range | 18 - 44 inches | |
Weight Range | 4 - 50 pounds |
Forward-facing
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |
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Height Range | 30 - 57 inches | |
Weight Range | 22 - 65 pounds |
Booster
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |
---|---|---|
Height Range | 40 - 57 inches | 38 - 57 inches |
Weight Range | 40 - 120 pounds | 40 - 100 pounds |
Dimensions and Weight
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |
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Width | 17.0 inches | 19.0 inches |
Height | 28.5 inches | 33.0 inches |
Depth | 16.0 inches | 20.0 inches |
Weight | 30.6 pounds | 16.6 pounds |
Core Specifications
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |
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Model Year | 2018 | 2019 |
Made In | China | China |
Frame Material | Reinforced Steel | Unknown |
Safety and Compliance
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |||||||||||||||||||||||||||||||
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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 Backless Booster |
High Back Booster |
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NHTSA Ease-of-Use Ratings |
Rear-Facing Mode
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Not rated by NHTSA. | ||||||||||||||||||||||||||||||
Previous Recalls | This car seat has never been recalled. | This car seat has never been recalled. |
Features
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |
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Attachment Methods |
LATCH Seatbelt |
LATCH Seatbelt |
Harness Type | 5-Point | 3-Point |
Cup Holders | Has cup holders. | Has cup holders. |
Warranty and Durability
Diono Radian 3RXT Safe+ | UPPAbaby Alta | |
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Manufacturers Warranty Length | 1 year | 2 years |
Lifespan | 10 Years | 10 Years |
Additional Links
See all Diono car seats | See all UPPAbaby car seats |
Full review of the Diono Radian 3RXT Safe+ Full review of the UPPAbaby Alta |