Diono Radian 3R, All-in-One Convertible Car Seat, Rear and Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Black Storm
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Availability:
In Stock.
Arrives
Saturday, Mar 28
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Style: Radian 3R Fits 3 Across
Color: Black Storm
Features
- Includes Comfort Travel Kit featuring complimentary colored head support pillow, comfort cushion and 2 XL cup holders.
- 10 Years One Car Seat - from Birth to Booster (5 - 120 lb) it's all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat!
- Rear Facing for Longer - lovingly engineered to keep your child rear-facing up to 50 lb.
- Fits 3-Across - our famous slim-fit design with zero compromises to safety, space, or comfort.
- Mechanically engineered from reinforced automotive grade high-strength steel, our unique core shell shields and protects your child.
- High-quality ComfortPlus Memory Foam, always included.
- The original and only all-in-one convertible car seat that folds for travel or compact storage. FAA approved for airline use.
Maximum Weight Recommendation: 120 Pounds
Minimum Height Recommendation: 18.1 Inches
Minimum Weight Recommendation: 5 Pounds
Maximum Height Recommended: 57.1 Inches
Rear Facing Maximum Weight: 50 Pounds
Forward Facing Maximum Weight: 120 Pounds
Rear Facing Minimum Weight: 5 Pounds
Forward Facing Minimum Weight: 22 Pounds
Forward Facing Car Seat Minimum Height: 29.9 Inches
Rear Facing Car Seat Maximum Height: 44.1 Inches
Installation Type: Latch
Orientation: Convertible Seat
Harness Type: 5-Point
Number of Height Positions: 1
Brand: Diono
Age Range Description: Kid
Infant Toddler Car Seat Type: Convertible Car Seat
UPC: 677726506408
Manufacturer: Diono
Unit Count: 1.0 Count
Item Dimensions D x W x H: 16.1"D x 16.9"W x 28.4"H
Item Weight: 24.01 Pounds
Material Type: Alloy Steel, Plastic, Polypropylene, Polystyrene
Color: Black Storm
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Mar 28
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Style: Radian 3R Fits 3 Across
Color: Black Jet
We bought 2 of these to fit in the backseat of our 2010 Toyota Camry. 1 rear facing, middle forward facing, next to infant (Uppababy Mesa) seat. Middle forward facing was the only way it would fit. Pro’s: slim, sturdy, easy for our kids to get into themselves, latch system is easy/works well. Good customer service from Diono. Our first one didn’t have the rear-facing piece in the box. Cons: * Very heavy! * Tall backside. Check your car seat manual whether a car seat is allowed to touch/rest against the front seat (if rear facing). Now having moved one to the middle back seat (forward facing) on our Honda Odyssey, it sits higher and blocks the rearview a bit. Wasn’t an issue in the Camry. No cupholders- fine, since that wouldn’t fit anyway. Not as much padding, so perhaps less comfortable, but both our kids are fine in them. Overal conclusion: great car seat if you have a tight back seat!
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Reviewed in the United States on February 12, 2025 by Esther
Style: Radian 3R Fits 3 Across
Color: Gray Slate
This is an excellent car seat for a growing toddler or child. We loved it so much that we purchased one for every car, including the grandparents’. My son had difficulty getting in and out of his previous car seat and struggled with buckling, but he has completely mastered it with this one. He feels more independent and proud that he can get in and out on his own. Another big plus is how space-conscious this seat is. We can comfortably fit two car seats and a third person in the middle seat of our SUV, which is perfect when traveling with extra passengers. Installation is easy, making it simple to move between different vehicles if needed.
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Reviewed in the United States on January 22, 2026 by Purposeful Picks
I got this for my youngest who sits in the middle with booster seats on each side for her brothers. It is narrower than the one it replaces and I really like the red color and design. It looks like a high quality car seat and feels premium. It looks great and fits great in my Range Rover Velar. Overall, I like it but there are a few things to consider: PROS 1. Great looking design 2. Premium feel 3. Easy for my 4-year-old daughter to buckler herself 4. Narrow 5. Comfortable for my daughter CONS 1. It's VERY heavy. If you have to take this seat out from time to time, that might be a concern. This is for my car but my wife would never go for a seat this heavy. It seems like it weighs twice as much as the older Maxi Cosi seat it replaces. If the weight of the seat is a concern, avoid this one. 2. There is nothing intuitive about installing this thing. I had to watch a YouTube video just to find the installation instructions. I'm not kidding - they are hidden in the back fabric and housing. Once you have the instructions, they are not much help. This illustrations are professionally drawn but hard to understand. Even getting the various straps out of the back plastic housings is tricky.
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Reviewed in the United States on February 19, 2021 by Jim S
Style: Radian 3R Fits 3 Across
Color: Black Jet
We had to replace our previous booster seat. One of the main things I was looking for was FAA approval for flights since we travel and wanted something we could take on the plane for our next vacation. It feels sturdy, safe, and well made. Definitely a great option if you’re looking for a car seat that works both in the car and for air travel.
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Reviewed in the United States on March 9, 2026 by Mirna Velasquez
We needed to upgrade our travel car seat and loved that this one folded up nice and compact. Love that it is FAA approved (that was a must for us) It worked really well in the rental car. Our buddy was quite comfortable. Set up was very easy. It is easy to get him in. The release for the belt is kind of tricky to find but easy to use once you got it. We got this one for the same price as the lower model on prime day and are so glad we did the safety plus just for that added comfort. The only drawback for travel is that it is HEAVY!!!
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Reviewed in the United States on September 7, 2025 by Patrick & Amanda O'Connell
Style: Radian 3R Fits 3 Across
Color: Gray Slate
Bought this to use in the car and side by side for granddaughter!! The ease of moving it from one to the other is great! The multiple locks and latches are nice! Fits well and slim in the car. Looks great and super sturdy.
Reviewed in the United States on December 14, 2025 by Michelle Garland
Style: Radian 3R Fits 3 Across
Color: Pink Blossom
With the birth of our daughter I needed to go 3 wide on the car seats, which I was told was impossible for my Dodge Charger. Well I purchased 2 of these Diono Radian 3R seats and it worked. The seats are really high quality, loved the added harness protection for toddlers who meet the weight requirement. High quality product and my 2 toddlers are comfortable in them.
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Reviewed in the United States on December 29, 2025 by Joseph Sickler Joseph Sickler
LOVE this car seat. I bought the first one, installed, used, loved it. Was thinking about getting a second one for another car of ours so we wouldn't have to move back and forth between. I left a nice review and mentioned I was thinking about a second one, and the company actually replied back thanking me, and offering me a 20% discount! Of course I took them up on it. This car seat works very well with our grandson that has brittle bone disease and needs to be handled very carefully. Getting him in and out is much easier than our old one, and he's happy in it too. Now between our house and his own house, he has 4 of these seats. Thank you again!!
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Reviewed in the United States on December 14, 2025 by Amazon Customer