Hi there! We're here to help you decide between the Diono Radian 3RXT Safe+ and the Graco Tranzitions 3-in-1 Harness Booster.
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+ | Graco Tranzitions 3-in-1 Harness Booster | |
Type |
Convertible Rear-Facing Forward-Facing High Back Booster Backless Booster |
Convertible Forward-Facing High Back Booster Backless Booster |
Current price |
Currently unavailable
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Currently unavailable
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Rating | 4.58 | 4.77 |
Our Thoughts
When it comes to choosing the perfect car seat for your child, there are two foremost contenders that most parents consider. The Diono Radian 3RXT Safe Plus and the Graco Tranzitions 3-in-1 Harness Booster, both have their unique offerings that can cater to different needs. Here's my take on the two as a parent, author, car seat expert, and reviewer.
The Diono Radian 3RXT Safe Plus really stands out with its slim design, making it an ideal choice for families who need to fit multiple car seats in one row, especially helpful for those with smaller vehicles or multiple children. This seat is commendable for its robust safety features such as a steel-reinforced frame and EPS foam for side-impact protection. However, the car seat can be quite challenging to install and reassemble after cleaning, which can be a significant drawback for some. It also offers an exceptional maximum weight limit of 120 pounds in booster mode and therefore allowing the child to stay in the seat for a prolonged period. Another notable advantage of this car seat is its ability to be used in both forward and rear-facing modes during air travel.
On the other hand, the Graco Tranzitions 3-in-1 stands out with its versatility and is designed to grow with your child. It can be transitioned from a harness booster to a high back booster, and finally, a backless booster which offers significant savings over time. However, despite having a lower maximum weight limit than its Diono counterpart, some parents might prefer this Graco model for its convenience features. It's considerably lighter and therefore more portable, excellent for families who frequently have to transfer the car seat between vehicles. The cleaning procedure is also simpler, with easy-to-remove-and-wash parts. However, the installation process can still be quite difficult and frustrating, a point worth considering.
When it comes down to the final verdict, my recommendation would hinge on what matters most to you as a parent. If robust safety features, long-term usability, and space efficiency are your top priorities, then the Diono Radian 3RXT Safe Plus would be a worthy investment. On the other hand, if your top considerations are convenience, portability, ease of cleaning, and a more budget-friendly price point, then the Graco Tranzitions 3-in-1 Harness Booster would be a more suitable choice. Bear in mind that both car seats have been given high safety ratings and meet the necessary federal safety standards, so you can rest assured that either choice would provide a safe travel environment for your child.
Key Details
Radian 3RXT Safe+ | Tranzitions 3-in-1 Harness Booster | |
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Brand | Diono | Graco |
Type |
Convertible Rear-Facing Forward-Facing High Back Booster Backless Booster |
Convertible Forward-Facing High Back Booster Backless Booster |
Weighted Rating | 4.58 | 4.77 |
1 yr Price Range | $259.99 - $349.99 | $97.99 - $139.99 |
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. |
![]() The price point combined with its 3-in-1 versatility offers significant savings over time. |
Safety |
![]() Steel-reinforced frame and comprehensive protection measures are a standout. |
![]() It meets Graco's ProtectPlus Engineered safety standards, which is a rigorous test for safety. |
Features |
![]() The 12-position headrest and machine-washable cover add notable convenience. |
![]() The Simply Safe Adjust Harness System and portable design are standout features. |
Installation |
![]() Installation and reassembly, especially of the seat cover, are noted as challenging. |
![]() Some parents find the installation process difficult and frustrating. |
Cleaning |
![]() The machine-washable cover is practical, but reinstallation can be cumbersome. |
![]() Easy to remove and washable parts make cleaning a breeze. |
Size |
![]() Its narrow design is ideal for fitting multiple car seats in a vehicle. |
![]() The lightweight and compact design make it convenient for transfers between vehicles. |
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 Graco Tranzitions 3-in-1 Harness Booster. 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+ | Graco Tranzitions 3-in-1 Harness Booster | |
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Height Range | 18 - 44 inches | |
Weight Range | 4 - 50 pounds |
Forward-facing
Diono Radian 3RXT Safe+ | Graco Tranzitions 3-in-1 Harness Booster | |
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Height Range | 30 - 57 inches | 27 - 57 inches |
Weight Range | 22 - 65 pounds | 22 - 65 pounds |
Booster
Diono Radian 3RXT Safe+ | Graco Tranzitions 3-in-1 Harness Booster | |
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Height Range | 40 - 57 inches | 0 - 49 inches |
Weight Range | 40 - 120 pounds | 30 - 100 pounds |
Dimensions and Weight
Diono Radian 3RXT Safe+ | Graco Tranzitions 3-in-1 Harness Booster | |
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Width | 17.0 inches | 19.0 inches |
Height | 28.5 inches | 26.5 inches |
Depth | 16.0 inches | 17.4 inches |
Weight | 30.6 pounds | 20.0 pounds |
Core Specifications
Diono Radian 3RXT Safe+ | Graco Tranzitions 3-in-1 Harness Booster | |
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Model Year | 2018 | 2018 |
Made In | China | China |
Frame Material | Reinforced Steel | Aluminum |
Safety and Compliance
Diono Radian 3RXT Safe+ | Graco Tranzitions 3-in-1 Harness Booster | |||||||||||||||||||||||||||||||||||||||||||||||||||
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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 |
Forward-Facing High Back Booster Backless Booster |
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NHTSA Ease-of-Use Ratings |
Rear-Facing Mode
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Forward-Facing Mode
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Previous Recalls | This car seat has never been recalled. | This car seat has never been recalled. |
Features
Diono Radian 3RXT Safe+ | Graco Tranzitions 3-in-1 Harness Booster | |
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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
Diono Radian 3RXT Safe+ | Graco Tranzitions 3-in-1 Harness Booster | |
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Manufacturers Warranty Length | 1 year | 1 year |
Lifespan | 10 Years | 7 Years |
Additional Links
See all Diono car seats | See all Graco car seats |
Full review of the Diono Radian 3RXT Safe+ Full review of the Graco Tranzitions 3-in-1 Harness Booster |