Product Dimensions | 16 x 17 x 28.5 inches |
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Item model number | 50620 |
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, Polypropylene, Plastic, 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 | 5 Pounds |
Forward-facing maximum child weight | 120 Pounds |
Harness type | 5-Point |
Item Weight | 25.9 pounds |
Country/Region of origin | China |
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- NO ADDITIONAL COST: You pay $0 for repairs – parts, labor and shipping included.
- COVERAGE: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
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- EASY CLAIMS PROCESS: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
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Diono Radian 3R, 3-in-1 Convertible Car Seat, Rear Facing & Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Jet Black
- You can return this item for any reason: no shipping charges. The item must be returned in new and unused condition.
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Enhance your purchase
Brand | Diono |
Installation Type | Latch |
Material | Alloy Steel, Polypropylene, Plastic, Polystyrene |
Color | Black Jet |
Orientation | Convertible Seat |
About this item
- REAR-FACING FOR LONGER: This slimfit convertible car seat is designed and engineered to keep your child rear facing even longer up to 50 lb/ 22. 7 kg, approx. 4 years old
- HIGH BACK BOOSTER: Keep your child safe and comfortable with the high back booster seat mode now up to 120 lb, 54 kg. The high back booster adds an extra layer of protection and comfort for any child transitioning into booster mode.Shell and Components: Spot clean
- 10 YEARS ONE CAR SEAT: With 4 ways to travel safely from birth to booster, the Radian 3R adapts as your child grows to offer a custom adjustable fit from birth to 120 lbs
- REINFORCED STEEL CORE: Mechanically engineered, reinforced steel core, made from automotive grade high density plastic and steel to create the ultimate protection for your child
- THE ORIGINAL 3 ACROSS: Built with our famous radian slim fit convertible design, to fit 3 across in most vehicles without compromising child or passenger comfort. Feel safe having your children secure in the backseat
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From the manufacturer


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5 - 50 lb
Newborn Rear Facing
Suitable from birth providing a perfect reclined seating position to reduce head movement
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5 - 50 lb
Rear Facing for Longer
Extended rear-facing from birth to keep your child in the safest travel position possible
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22 - 65 lb
Forward Facing Harness
Once little one has outgrown rear-facing, forward-facing harness keeps your growing child secure
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40 - 120 lb
High Back Booster
In Booster Mode, Radian 3R continues to protect by raising their height to the correct seat belt fit
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Slim design for 3 across
Slim design for a 3-across fit with any Diono Radian and combination of any passenger age without compromising safety or comfort
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Folds - FAA Approved
FAA Approved for travel with flat, folding design for easy carrying and storing overhead
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Machine Washable Cover
Easy remove machine wash covers to keep fabrics fresh and clean after use
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Memory Foam Comfort & Protection
Deep cushioned seat base for contoured memory foam comfort and support
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The original 3 Across
Expertly engineered since 2005 to provide complete 3-across protection from birth to booster
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Automotive Grade Steel Core Frame
Inspired by the Seattle aerospace industry to provide safety you can feel at the very core of every seat
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Easy Remove Covers for Easy Cleaning
Clean your cover in just a few simple steps with easy remove machine washable covers
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5-Point Harness
Considered the safest way for children to travel by child passenger safety experts
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Easy boarding
Encourage passenger independence when forward-facing with a low sitting profile for easy boarding
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Shock Absorbing Technology
Diono patented technology that reduces force and absorbs energy when used in Forward Facing harness mode from 22 to 40 lb

Safety Information
Product Description
The Diono Radian® 3R is the original slimfit 3 across all-in-one convertible car seat, designed to protect from baby to booster seat (5 - 120 pounds). 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 pounds. 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 slimfit design will fit 3 across in most vehicles without compromising child safety or passenger comfort. 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.
Product information
Technical Details
Additional Information
ASIN | B083F5P7VP |
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Customer Reviews |
4.8 out of 5 stars |
Best Sellers Rank | #1,273 in Baby (See Top 100 in Baby) #3 in Convertible Child Safety Car Seats |
Warranty & Support
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Customer reviews
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Reviewed in the United States on December 27, 2021
Top reviews from the United States
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All in all, this is a very sturdy car seat, easy to install with the base. My son has always been comfortable in it, and he is a hefty boy. I do wish it was made of a sturdier fabric as my son spills everything and the cover isn't as washable as I would hope for. It stands up to a delicate cycle by itself just fine, but some messes require more scrubbing that this cover wouldn't stand up to. Regardless, I would absolutely recommend this car seat. All of the nurses tending to me asked about the car seat once they found out my son had been in the wreck and saw how happy and healthy he was. I recommended this Diono to all of them!!
No damage to the seat what so ever! Due to manufacture instructions, the car seat needed to be replaced regards if the seat looks intact.
Insurance covered the cost of a new car seat and we got the exact same one. Thanks to Amazon’s available we were able to get a new one the next day.

Reviewed in the United States on December 27, 2021
No damage to the seat what so ever! Due to manufacture instructions, the car seat needed to be replaced regards if the seat looks intact.
Insurance covered the cost of a new car seat and we got the exact same one. Thanks to Amazon’s available we were able to get a new one the next day.


--super easy to clean
--very narrow(the only issue is they are very long so if you are rear facing as you can see in the photo it sticks out alot)
--Buckles are SO easy
Cons
--i have 3 kids and have installed many a carseat. When I say these are by far the hardest I mean it. Im not sure if it was because we have so many or so close together but whatever the case this is not a carseat you Uninstall all willy nilly.
I am very happy with this carseat and if you have 3 under 2 like me, just buy it and save yourself the time of trying to make 10 other carseats fit 3 across.

Reviewed in the United States on September 22, 2020
--super easy to clean
--very narrow(the only issue is they are very long so if you are rear facing as you can see in the photo it sticks out alot)
--Buckles are SO easy
Cons
--i have 3 kids and have installed many a carseat. When I say these are by far the hardest I mean it. Im not sure if it was because we have so many or so close together but whatever the case this is not a carseat you Uninstall all willy nilly.
I am very happy with this carseat and if you have 3 under 2 like me, just buy it and save yourself the time of trying to make 10 other carseats fit 3 across.

We drive a Subaru Forester and a Kia Niro and have a 5 year old, a 3 year old, and an 8 month old. These seats are perfect for all the kids though we did have to wait for the baby to get a bit chubbier to fit in his (it seems like he was about 3 months old when he was big enough to fit properly). We got seat organizers for the back of the driver's seat for sunglasses and kids toys. Since there are no cup or snack holders the back of the car is so much cleaner with these seats too! All three of the kids can nap just fine in these for family road trips.


UPDATE 6/20/2020 Another open box used seat arrived today . I'll just keep on returning till Amazon send me a new one like I bought . Very shabby
UPDATE 6/13/2020 I've now went from 4 stars to one . Got three of these (see original review) , just bought my Daughter in law one as she took the spare and wants the same set up . The seat arrived today , it's in a bashed up box I can see is a return. The packing inside is retaped and bits are missing . This is so shabby . I am sending back for replacement as I didn't buy an open box . Sort it out Amazon , I'm not the only buyer to get a used seat .
ORIGINAL POSTBought 3 of these for a 2015 Grand Cherokee , useless unless you want to be pushed up against the steering wheel, I wouldn't bother with the middle , I am now using a Chicco Convertible for the rear facing for my 6 month old . In 18 month time I'll get another Diono 3R for the middle forward facing as that set up is perfect .
These seats are just too tall for rear facing . Otherwise everything else is OK with the seats . Build quality is excellent .
Top reviews from other countries

The instruction manual IS there and it’s located inside the carseat at the back in the upper left side, there is a small symbol showing a book on the seat cover and if you unbutton the cover you can access it easily and pull it out (see my photos).
I used the UAS strap to secure it but it definitely was not tight enough, seems to be common in my truck. But once I also attached the tether by following the instructions and looping it around the seat in fronts track, it appears to be tight enough now. I am going to double check it and if needed add the seatbelt as well. This is only the third car seat I’ve ever installed before so I’m not a complete expert.
My daughter hasn’t used it yet but I will update my review once we use it for a while. I bought this particular car seat because it looks simple and it doesn’t block her view much and it feels very comfortable just from me pressing on it. And it is supposedly good for extended rear-facing. It is also a nice looking car seat from a reputable brand.


Reviewed in Canada on July 1, 2021
The instruction manual IS there and it’s located inside the carseat at the back in the upper left side, there is a small symbol showing a book on the seat cover and if you unbutton the cover you can access it easily and pull it out (see my photos).
I used the UAS strap to secure it but it definitely was not tight enough, seems to be common in my truck. But once I also attached the tether by following the instructions and looping it around the seat in fronts track, it appears to be tight enough now. I am going to double check it and if needed add the seatbelt as well. This is only the third car seat I’ve ever installed before so I’m not a complete expert.
My daughter hasn’t used it yet but I will update my review once we use it for a while. I bought this particular car seat because it looks simple and it doesn’t block her view much and it feels very comfortable just from me pressing on it. And it is supposedly good for extended rear-facing. It is also a nice looking car seat from a reputable brand.












Reviewed in Canada on October 17, 2021




Reviewed in Canada on February 7, 2021


Manufacture date was March 2021, product received Dec 2021 so it has most of the 10 years of life available for us to use. It's the Canadian version and so meets requirements for this country.
Only difficulty was my mistake, I tried to tighten down the top strap more than it needed to be and wasted a bunch of time, otherwise the install was straight forward.
Also don't forget that the manual is BEHIND the car seat in a little nook.
Overall we're glad to have it. No complaints so far. Would highly recommend.


Reviewed in Canada on January 7, 2022
Manufacture date was March 2021, product received Dec 2021 so it has most of the 10 years of life available for us to use. It's the Canadian version and so meets requirements for this country.
Only difficulty was my mistake, I tried to tighten down the top strap more than it needed to be and wasted a bunch of time, otherwise the install was straight forward.
Also don't forget that the manual is BEHIND the car seat in a little nook.
Overall we're glad to have it. No complaints so far. Would highly recommend.

