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🚀 Travel smart, protect longer — the only car seat your family will ever need!
The Diono Radian 3R is a premium 3-in-1 convertible car seat designed for ultimate longevity and safety, accommodating children from 5 to 120 pounds. Featuring a reinforced automotive-grade steel frame, it offers extended rear-facing protection up to 50 pounds and a slim design that fits three seats across most vehicles. With FAA approval and foldable portability, it’s engineered for modern families who demand convenience without compromising on security.






























| ASIN | B083F5P7VP |
| Age Range Description | Newborn |
| Best Sellers Rank | #1,372 in Baby ( See Top 100 in Baby ) #8 in Convertible Child Safety Car Seats |
| Brand | Diono |
| Color | Black Jet |
| Customer Reviews | 4.7 out of 5 stars 7,873 Reviews |
| Forward Facing Car Seat Minimum Height | 29.9 inches |
| Forward Facing Maximum Weight | 120 pounds |
| Forward Facing Minimum Weight | 26.5 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 | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| 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 |
| Model Number | 50620 |
| Number of Height Positions | 1 |
| Orientation | Convertible Seat |
| Part Number | 50620 |
| 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 | 677726506200 |
| Unit Count | 1 Count |
R**G
Best car seat out there!
Our favorite car seat / booster or all time! Worth the price!! Fits 3 across, easy for toddler to buckle themselves and goes in the third row of the car! Also it’s good for 10 years which is much longer than most car seats!
A**N
Easy to Install and Uninstall
They truly do fit 3 across, even in my compact SUV. The quality is nice and easy to assemble and clean! One of the easiest car seats to install and uninstall in a car. Personal I would not recommend for Forward facing though, even though they say they can, it does not seem secure enough for me!
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.
R**A
Bought 2 & would buy more
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..
N**S
Make sure that you have a vehicle that has all safety hooks for rear and front face use
The car seat is nice however with certain vehicles using the top tether hook for safety is not an option while using in rear facing. No instructions came in the box so I had to google the manual. According to the manual the top tether safety latch is supposed to be used when in rear facing. It is rather big still for my back seat even though it is a slim fit. Not much when adjusting it is pretty basic. I have not cleaned it yet since I just got it yesterday. My baby seems to be comfortable to n it but when he falls asleep I worry with the way his head slumps over.
D**L
Diono Radian 3R - A Game-Changer in Car Seat Comfort and Safety!
The Diono Radian 3R 3-in-1 Convertible Car Seat has proven to be an absolute game-changer for our family, and my son absolutely loves it! The versatility of this car seat is outstanding – from rear-facing to forward-facing, it's designed to accommodate different stages of a child's growth. The 10-year lifespan is a fantastic feature, providing peace of mind knowing that it will last through various developmental milestones. My son finds the seat incredibly comfortable, and the plush padding adds an extra layer of coziness. The reinforced steel frame gives a sense of security, and the installation process was surprisingly straightforward, thanks to the clear instructions provided. What sets the Diono Radian 3R apart is its slim design, making it a perfect fit even in compact cars without compromising safety. The adjustable headrest and harness system ensure a snug and secure fit as my son continues to grow. As a parent, I appreciate the ease of cleaning – the fabric is removable and machine washable, a lifesaver for those inevitable spills and messes. If you're in search of a convertible car seat that prioritizes both comfort and safety, the Diono Radian 3R is an excellent choice. It has made our car journeys much more enjoyable for my son, and as a parent, I couldn't be happier with this purchase! 🚗👶🌟 #DionoRadian3R #ConvertibleCarSeat #SafetyFirst
E**E
Fit
Nice car seats. I needed 3 car seats in my back seat. Easy to install. Even easier to remove.
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.
J**E
Our favourite car seat
We love this chair; and have had a variety of other brand car seats over the years. 1) it's more narrow and streamlined than anything else we've used - which is why we bought it (3 kids in a 5 year window and a 3 across car seat configuration). 2) The straps adjust easily; tighten and loosen smoothly! (other seats we've used feel like you're constantly tugging and readjusting and just fighting with the straps. I've never fought with these). 3) maintenance is simple, cover goes on and off easily and you can throw it in the wash. It has other cool features we haven't used much, but I like that it can basically fold up if you ever travel with it. "Cons". a) The seat is heavy, so if you're moving it from one car to another often that would be a pain. Personally I like how solid it feels, and we don't move it much so it's not an issue. b) we put a small rip in the cover fabric the month we got it, but were able to sow it back up and no issues since (one of the kids climbed over the back of the seat and their shoe somehow snagged the cover). c) REAR FACING the seat leans back really far (further than any other seat we've used) - you have to move the front seat ahead of it quite a ways up for it to fit properly. They do sell an angle adjuster that can go under the seat to help mitigate this, but I haven't purchased one. Either way, we love it and maybe should've picked a more gender neutral colour. I wish we had started with this car seat from the beginning with our first kid.
L**I
Great Car Seat – We Bought Two
This was our first car seat purchase of this brand, and we’re so happy with it! Our child loves it even on long drives. It was super easy to install, and we felt confident choosing it after reading the strong safety ratings. It’s also easy to clean the cover comes off easily and can be tossed in the wash, then air-dried. It’s narrow enough to fit multiple seats across and works great rear-facing in smaller vehicles as well. We liked it so much, we bought a second one for our other vehicle. Great quality at a reasonable price highly recommend!
Trustpilot
3 weeks ago
2 weeks ago