The Diono Radian® 3RXT® SafePlus® Convertible Car Seat solves the problem of needing a long-lasting, all-in-one car seat that grows with your child. Suitable from birth to booster (4-120 lbs), this car seat offers 4 modes in 1 seat—rear-facing, forward-facing, and high-back booster. It provides ultimate protection with SafePlus® rear-facing engineering up to 50 lbs, and its steel anti-rebound bar reduces rebound rotation by up to 50%. Visually, you’ll notice the slim-fit design, which allows for 3-across installation in most vehicles without compromising on space, safety, or comfort. The seat features SafePlus® 6-layer side impact protection and is designed with reinforced automotive-grade high-strength steel for enhanced protection.
The Radian® 3RXT® SafePlus® car seat benefits users by providing both safety and convenience. It features a one-hand easy-adjust 12-position headrest for personalized comfort, along with 6 layers of rigorously tested side impact protection. Additionally, this car seat folds for travel and compact storage, and is FAA approved for airline use. You can visually see its compact and sleek design, which is not only functional but stylish. The design ensures that you don’t have to compromise on space while keeping your child safe and comfortable. For easy maintenance, the covers are machine washable (cold) and should be line dried, while the shell and components can be spot cleaned.
Diono, with over 20 years of expertise, a pioneer in car seat innovation since 1999, introducing industry firsts such as the Radian® All-in-One seat with a full steel core. Based in Seattle, the brand is committed to designing high-quality, rigorously tested products that meet and exceed safety standards. From car seats to strollers, baby carriers, and travel accessories, Diono creates thoughtfully engineered solutions that prioritize child safety, comfort, and ease of use for parents worldwide.
Diono Radian® 3RXT® SafePlus + Booster Seat Features:
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4 Modes in 1 Seat: Rear-facing (from 4 lbs), rear-facing longer (up to 50 lbs), forward-facing, and high-back booster modes, suitable for children from birth to 120 lbs.
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SafePlus® Rear-Facing Engineering: Rear-facing protection up to 50 lbs with 3 modes of newborn protection.
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Anti-Rebound Bar: Reduces rebound rotation by up to 50% for increased safety during a collision.
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Slim-Fit Design: Allows for 3-across installation in most vehicles without compromising space, safety, or comfort.
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SafePlus® 6-Layer Side Impact Protection: Provides enhanced safety in case of a side-impact collision.
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Reinforced Steel Core: Mechanically engineered from automotive-grade high-strength steel for superior protection.
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12-Position Adjustable Headrest: Offers custom comfort as your child grows, with easy one-hand adjustment.
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Foldable Design: Convenient for travel and compact storage, making it ideal for families on the go.
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FAA Approved for Airline Use: Approved for use on airplanes, providing a safe travel option for your child.
| Unfolded Dimensions: | 16" D x 17” W x 28.5” H |
| Folded Dimensions: | 11.5” D x 17” W x 28.5” H |
| Seat Weight: |
30.6 lbs |
| FAA Approved: |
Yes |
| Number of Head Support Positions: |
12 |
| Fits 3-Across: |
Yes |
| Anti-Rebound Bar: |
Yes |
| Cup Holders: |
Yes |
| Warranty: |
12 months standard warranty, extendable to 10 years |
| Recommended Use | |
| Rear-Facing Weight Capacity: |
4–50 lbs (LATCH limit: 35 lbs) |
| Forward-Facing Weight Capacity: |
22–65 lbs (LATCH limit: 40 lbs) |
| Minimum User Weight Capacity: |
4–120 lbs |
| Booster Weight Capacity: |
40–120 lbs |
| Height Limit: |
Up to 57.1" |
| Care & Maintenance: |
Covers: Machine wash cold, line dry Shell and Components: Spot clean |
| Brand: | Diono |
| Black Jet Manufacturer SKU: | 50100-NA-01 |
| UPC: | 677726501007 |
| Gray Slate Manufacturer SKU: |
50101-NA-01 |
| UPC: |
677726501014 |
| Blue Sky Manufacturer SKU: |
50104-NA-01 |
| UPC: |
677726501045 |
| Red Cherry Manufacturer SKU: |
50103-NA-01 |
| UPC: |
677726501038 |
| Purple Plum Manufacturer SKU: |
50105-NA-01 |
| UPC: |
677726501052 |
- 1- SafeStop® System
- 1- Lap Belt Cushion
- 1- Rear-Facing Base
- 1- Cup Holder
- 1- Harness and Buckle Pads
- 1- 2-in-1 Infant Positioning Liner
- 1- Newborn Travel High Wedge
- 1- Product Manual
What are the weight and height limits for each mode?
The Radian® 3RXT® SafePlus® supports the following limits: Rear-Facing: 4–50 lbs (44 inches height limit), Forward-Facing: 22–65 lbs, and Booster: 40–120 lbs (up to 57.1 inches). It also provides newborn protection starting at 5 lbs with features like SafePlus® engineering, a 2-in-1 infant positioning liner, and high wedge for added comfort and safety.
Can I fit three Radian® 3RXT® seats across in my car?
Yes, the slim-fit design allows for 3-across installation in vehicles with a minimum width of 51 inches, making it ideal for families with multiple children.
What is SafePlus® engineering and how does it enhance safety?
SafePlus® engineering offers advanced protection with a steel anti-rebound bar, side impact pods, and a 6-layer side impact protection system, ensuring enhanced safety for your child in both rear and side-impact crashes.
Is this seat suitable for newborns?
Yes, the Radian® 3RXT® SafePlus® is suitable for newborns starting at 5 lbs. It includes a 2-in-1 infant positioning liner and high wedge, along with SafePlus® engineering features for optimal newborn protection.
Does the car seat fold for storage or travel?
Yes, it folds flat for compact storage and is FAA-approved for air travel, making it a convenient option for families who travel often.
What is the purpose of the anti-rebound bar?
The anti-rebound bar helps reduce rearward rotation by up to 50% in the event of a collision, providing additional stability and improving safety during a crash.
Does this seat come with a cup holder?
Yes, the Radian® 3RXT® includes a removable, dishwasher-safe cup holder that easily attaches to the seat for added convenience.
Are Diono® accessories compatible with this seat?
Yes, Diono® recommends accessories like the Angle Adjuster®, Car Seat Travel Backpack, and Side Impact Pods, which are designed to enhance comfort, safety, and convenience.
How do I clean the seat covers?
The seat covers are machine washable on a cold cycle and should be line dried to maintain their quality and ensure long-term durability.
How long can I use the Radian® 3RXT® SafePlus?
The car seat has a lifespan of 10 years from the date of purchase, providing long-lasting use throughout your child’s development.
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