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Diono

Diono Radian 3R, 3-in-1 Convertible Car Seat, Rear Facing & Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Pink Blossom

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Style: Radian 3R Fits 3 Across


Color: Pink Blossom


Features

  • 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.

Description

The Diono Radian 3R is the original slim-fit 3 across All-in-One convertible car seat, designed to protect from baby to booster seat (5 - 120 lb). Lovingly engineered with the famous Diono steel reinforced frame and now rear facing for even longer, expect 10 years of safety from just one car seat. Designed and engineered with complete rear facing protection, so you can keep them in a safe rear facing convertible car seat for longer up to 50 lb. Built with a mechanically engineered, reinforced steel frame, made from automotive grade high strength steel, the radian is always ready to shield and protect. And when your family grows, the slim-fit design will fit 3 across in most vehicles without compromising child safety or passenger comfort. Our SuperLATCH system (UAS Compatible) makes installation easy and super secure. As travel car seat experts, Diono have naturally built in super portable and convenient features to the Radian 3R with original fold for easy transport and storage and easy remove machine washable covers. The radian is also aircraft certified (FAA approved), so you can take safety with you wherever you go.

Brand: Diono


Installation Type: Latch


Material: Alloy Steel, Plastic, Polypropylene, Polystyrene


Color: Pink Blossom


Orientation: Convertible Seat


Product Dimensions: ‎16.1 x 16.9 x 28.4 inches


Item model number: ‎50624


Is Discontinued By Manufacturer: ‎No


Minimum weight recommendation: ‎5 Pounds


Maximum weight recommendation: ‎120 Pounds


Minimum height recommendation: ‎18.1 Inches


Maximum height recommendation: ‎57 Inches


Material Type: ‎Alloy Steel, Plastic, Polypropylene, Polystyrene


Material Composition: ‎90% Polyester, 10% Spandex


Care instructions: ‎Covers Machine wash cold, line dry. Shell and Components Spot clean


Additional product features: ‎Fits 3 Across


Number Of Items: ‎1


Style: ‎Radian 3R Fits 3 Across


Number of reclining positions: ‎1


Batteries required: ‎No


Orientation: ‎Convertible Seat


Rear-facing minimum child weight: ‎5 Pounds


Rear-facing maximum child weight: ‎50 Pounds


Forward-facing minimum child weight: ‎22 Pounds


Forward-facing maximum child weight: ‎120 Pounds


Harness type: ‎5-Point


Item Weight: ‎23.4 pounds


Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

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.

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Similar Products

Top Amazon Reviews

    • Fits 2 in a row with additional infant seat in Toyota Camry!
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! ... show more
Reviewed in the United States on February 12, 2025 by Esther
    • Great for Tight Spaces and Growing Kids
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. ... show more
Reviewed in the United States on January 22, 2026 by Purposeful Picks
    • Easy to move from one vehicle to the other i
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
    • Fits 3 wide, Great quality worth the $
Style: Radian 3R Fits 3 Across Color: Pink Blossom
Review Image by Joseph Sickler Joseph Sickler
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. ... show more
Reviewed in the United States on December 29, 2025 by Joseph Sickler Joseph Sickler
    • Great car seat, super heavy for travel.
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!!! ... show more
Reviewed in the United States on September 7, 2025 by Patrick & Amanda O'Connell
    • Great quality, easy to install and use, and great customer service!
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!! ... show more
Reviewed in the United States on December 14, 2025 by Amazon Customer
    • Absolutely life changer!
Style: Radian 3R Fits 3 Across Color: Pink Blossom
Review Image by Nereyda Ernst Nereyda Ernst
Review Image by Nereyda Ernst Nereyda Ernst
I have 3 littles in car seats. I bought a mini van for our growing family, only to find that with most car seats would take my 3seater backseat room entirely up by only 2 car seats and not allow room for another car seat or a small person to fit. I came across these car seats that claim to fit 3-across. Was skeptical to purchase 3 of them at once because let’s face it it’s a big purchase. I took a chance and 🤞🏼 that they would fit. They arrived and I was very impressed by the quality of the car seats and then I installed them and my goodness, they fit!! I’m so happy 😀 I can finally use the 3rd seat space in the back seat, which is why I bought the van for. Absolutely, great job Diono, you nailed it! 🩷 Attaching before and after photos. ... show more
Reviewed in the United States on January 16, 2026 by Nereyda Ernst Nereyda Ernst
    • Bought 2 & would buy more
Style: Radian 3R Fits 3 Across Color: Black Jet
Super sleek, safe & sturdy. It’s so easy to strap the kids in & adjust knowing they’re safe & secure. I love the strap pads that would 💯 prevent any necks getting slit in an accident. It’s easy to take in & out but it’s definitely not recommended as a grab & go car seat. It’s solid.. the steele frame makes it pretty heavy so as long as you aren’t puny, you’ll be fine. You might break a sweat, transporting it and putting it in another car, but would you rather than be safe or in a cheap inexpensive Walmart car seat with straps that constantly twist. Super comfortable, apparently. My son usually falls asleep before we even get out of town. I bought one for my mom’s car and my husbands mom’s car. We have a different Dion model in ours but this one is easier to use honestly.. ... show more
Reviewed in the United States on December 30, 2025 by Rebecca

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