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🚗 Travel smart, fit more, protect best — the Radian 3R has your back (and your kids) covered!
The Diono Radian 3R is a premium all-in-one convertible car seat designed for children from birth up to 120 lbs. Featuring a slim 16.9" width to fit three seats across, it offers rear-facing protection up to 50 lbs and forward-facing use beyond. Its reinforced steel core provides military-grade safety, while ComfortPlus memory foam cushions every ride. FAA-approved and foldable for travel, this seat combines longevity, safety, and convenience in a stylish Pink Cotton Candy finish.






























| ASIN | B0CH8B3BJL |
| Age Range Description | Kid |
| Best Sellers Rank | #2,168 in Baby ( See Top 100 in Baby ) #11 in Convertible Child Safety Car Seats |
| Brand | Diono |
| Color | Pink Cotton Candy |
| Customer Reviews | 4.7 out of 5 stars 8,176 Reviews |
| Forward Facing Car Seat Minimum Height | 29.9 Inches |
| Forward Facing Maximum Weight | 120 Pounds |
| Forward Facing Minimum Weight | 26.5 Pounds |
| Harness Type | 5-Point |
| 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 Weight | 23.4 Pounds |
| Manufacturer | Diono |
| Material | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| Material Type | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| Maximum Height Recommended | 57.1 Inches |
| Maximum Weight Recommendation | 120 Pounds |
| Minimum Height Recommendation | 18.1 Inches |
| Minimum Weight Recommendation | 5 Pounds |
| Model Number | 50644 |
| Number of Height Positions | 1 |
| Orientation | Convertible Seat |
| Part Number | 50644 |
| Product Dimensions | 16.1"D x 16.9"W x 28.4"H |
| Rear Facing Car Seat Maximum Height | 44.1 Inches |
| Rear Facing Maximum Weight | 50 Pounds |
| Rear Facing Minimum Weight | 5 Pounds |
| UPC | 677726506446 |
| Unit Count | 1.0 Count |
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!
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.
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.
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!!!
J**R
3 across in smaller car
There were 2 features I purchased this for. The narrow construction that allows for 3 carseats side by side. It took 2 of these and another narrow seat to fit forward facing in a Saturn ion. Second is the all in one. Won't need to buy another seat or booster. If used rear facing, these take up more room than other seats. They are tall, plus the angle make it difficult to fit in a small car with a tall person in the front seat. Would not work for an infant in my Ion. I also like that is very sturdy. There's lots of metal in the construction. Feels safer. The trade-off is that it's heavy. But that's not a concern unless moving it from car to car all the time. Have only used as a forward facing carseat so far. But I like all the options that it can be used for. There are less expensive seats, but having to buy a rear facing, then forward, then a booster ads up. May save money in the long run if starting with just this one all-in-one. On the other hand, the dedicated infant car seats that can detach are super handy for going into stores without unbuckling your baby. Something to consider. Overall, highly recommend this seat.
P**L
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!!!
S**F
Magenta is beautiful, kids love these car seats
Had it for about 2 months. This radiant pink is beautiful! My toddler loves it too. It was more difficult to install it rear facing so ended up setting it up forward facing. Instructions aren’t super easy to follow, nor the installation process. Lucky for me husband got it figured out. Removability: Haven’t removed it yet since the day it was installed so can’t speak to that. It fits great and gives plenty of space for children to move around when not buckled in. Based on my children’s unspoken review (I can tell they love sitting in it and enjoy being able to see through the window), I would definitely recommend other parents to get it. There isn’t much side padding like impact safety that other car seats have but it doesn’t bother me since it’s certified for safety. My 3 year old can unbuckle the top part himself. The buckle design is durable and yet comfortable. Haven’t seen any marks on the neck from the harness rubbing against their body. I think it’s great! I hope it will last for a long time as advertised.
E**S
Great product, would recommend
Really like how easy it is to install and move around if needed. Quite an upright position tho, maybe our vehicle is to blame for seat shape. My boy would not give 5 stars as he's not a fan of any car seat, but that's too be expected.
E**I
Excelente tamaño y seguridad
La mejor silla si tienes una familia de 3 niños caben perfectamente 3 sillas en la parte trasera del coche
L**T
Buen asiento
Ocupas ser un Ingeniero Aeronautico o automotriz para Instalarlo. Es demasiado Dificil su instalación. Pero brinda buena protección al BB
L**A
5 point harness for older children
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
Three wide car seat. Very convenient
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
Taille réduite, qualité supérieure
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!
Trustpilot
1 month ago
4 days ago