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🛡️ Travel smart, protect longer, fit smarter — the Diono Radian 3R has your back (and your kids) covered!
The Diono Radian 3R is a premium 3-in-1 convertible car seat designed for newborns through booster age (5-120 lbs). Featuring a reinforced automotive-grade steel frame, it offers extended rear-facing protection up to 50 lbs and a slim profile that fits three seats across most vehicles. FAA approved and foldable for travel, it combines safety, comfort with memory foam padding, and space-saving design—making it the ultimate decade-long investment in child car safety.




| ASIN | B083F5P7VP |
| Age Range Description | Newborn |
| Best Sellers Rank | #1,338 in Baby ( See Top 100 in Baby ) #8 in Convertible Child Safety Car Seats |
| Brand | Diono |
| Color | Black Jet |
| Customer Reviews | 4.7 4.7 out of 5 stars (8,142) |
| Forward Facing Car Seat Minimum Height | 29.9 Inches |
| Forward Facing Maximum Weight | 120 Pounds |
| Forward Facing Minimum Weight | 22 Pounds |
| Global Trade Identification Number | 00677726506200 |
| Harness Type | 5-Point |
| Included Components | radian® 3R car seat, detachable rear-facing base, foam harness pads, lap belt cushion, Safe Stop®energy absorbing harness, rear-facing top tether, Instruction manual |
| Infant Toddler Car Seat Type | Convertible Car Seat |
| Installation Type | Latch |
| Item Dimensions D x W x H | 16.1"D x 16.9"W x 28.4"H |
| Item Type Name | All-in-One |
| Item Weight | 23 Pounds |
| Manufacturer | Diono |
| Manufacturer Warranty Description | 12 months |
| Material Type | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| Maximum Height Recommended | 57 Inches |
| Maximum Weight Recommendation | 120 Pounds |
| Minimum Height Recommendation | 18.1 Inches |
| Minimum Weight Recommendation | 5 Pounds |
| Number of Height Positions | 1 |
| Orientation | Convertible Seat |
| Rear Facing Car Seat Maximum Height | 44.1 Inches |
| Rear Facing Maximum Weight | 50 Pounds |
| Rear Facing Minimum Weight | 5 Pounds |
| UPC | 677726506200 |
| Unit Count | 1.0 Count |
P**S
Great for Tight Spaces and Growing Kids
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.
J**S
I like it but it's heavy and tricky to install
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.
M**Z
Great Option for Travel
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.
D**R
Awesome car seat.
One of the best car seats we have owned after years of many babies rotating in and then out of car seats. Heavy, easy to install and soft seat pad. Great deal.
G**Y
A bit niche, but exactly what I needed.
So, as a former CPST, I have a love/hate relationship with the Diono Radian (and its precursor, the Sunshine Kids version). It's a fantastic narrow, low profile seat that fits in seating situations that other seats can't. It's also the most uniquely difficult car seat I have ever worked with. The Radian has multiple 'rules' and 'modes' that must be switched based on the direction the seat is facing and the weight of the child riding in it, making it easy to misuse and impractical for any situation where you have to move the seat or reconfigure it often. However, knowing this, I diligently read the manual, tested everything out, configured it properly for my son (5 years old, 36 lbs, 42"). He is using the second harness slots from the top so he has room to grow. Installing it in the car was another trick. Of the three rear seating positions in our car, two have removable headrests and one has a fixed, forward head rest (the center seat). The Radian can be securely installed in either of the outboard positions, but it can only be used RF in the center seat because the fixed forward head rest does not allow the car seat to sit flush against the vehicle seat back. This was somewhat frustrating, because due to its narrowness it is an ideal seat to use in the center position, so I was a little bummed. However, it is now installed outboard for my son and is so low profile that my daycare kiddo has no problem climbing over him to get to his booster in the pick up line at school. Overall, this can be a difficult seat to use. 10000% recommend meeting with a certified Child Passenger Safety Technician if you purchase this one, just to make sure you're using it properly given some of its unique features. But as far as quality and ability to use next to other seats, it's great.
E**R
Fits 2 in a row with additional infant seat in Toyota Camry!
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!
D**E
Safe, affordable, & comfort all in one!!!
Great car seat! It’s sturdy & very sheik I love the easy cleaning fabric it has, it is very heavy which makes me feel like my baby is safe in it! It’s got adjustable shoulder straps & head rest adjustments as well so it can grow with your baby. The seat part also has side adjustments so it can be narrow or wider which is a neat feature! I won’t be using it for travel but it folds up and could be easy to transport if you can carry the heavy weight of it. For the price of this car seat it was a steal!!! We spent double on a Gracie brand before and i feel this car seat is much safer, it’s also roll over tested which is great because not many car seats have that. I will say the cup holders are terrible they fall out very easily but I rather my kid be safe than have a cup holder!!! I was able to fit 2 of these car seats in with a Doona in my Ford Escape 2018 which was suppose to be impossible but the fact of how compact it is made it possible, my boys also say it’s very comfortable which is a huge bonus! Definitely a must buy car seat!!!
E**I
La mejor silla si tienes una familia de 3 niños caben perfectamente 3 sillas en la parte trasera del coche
L**T
Ocupas ser un Ingeniero Aeronautico o automotriz para Instalarlo. Es demasiado Dificil su instalación. Pero brinda buena protección al BB
L**A
Great chair struggled to get a chair with a 5 point harness for my 5year old who can't use a normal seatbelt.
A**N
These seats are great. I have six of them. Three kids, three vehicles, They are easy to fold, easy to swap in and out and they fit three wide in my sedan. There are very few car seats that fit three wide. I keep buying the same seats, with the same color so when I rotate them between vehicles the children aren't picky as to " that's my seat"
A**R
Acheté en remplacement d'un siège dans une auto qui m'avait été volée. Excellente qualité, assez étroit pour en rentrer 3 sur une banquette arrière, voire 2 avec un (petit) adulte entre les 2. Revendu avec une excellente valeur de revente, mais aurait pu être utilisé plusieurs années encore!
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