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Diono Radian 3R All-in-One Convertible Car Seat 2019 Blue

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Your child’s security is Diono's top priority. The Radian 3R was engineered with premium, innovative features like a steel alloy frame, aluminum reinforced sidewalls, energy absorbing EPS foam and a reinforced adjustable head support to keep your little one protected and comfortable.

Some say three’s a crowd. We say, the more the merrier! The radian® 3R car seats fit 3-across in most mid-size vehicles.

Extended rear-facing

The radian® 3R keeps children comfortably rear-facing from 5-40 pounds for the safest possible position.

Room to grow

Accommodates forward-facing children up to 65 pounds in a 5-point harness and converts to booster mode for kids 50-100 pounds. The aluminum reinforced, adjustable head support and sidewalls provide additional side impact protection.

Worth the Weight

Diono's convertible car seats are made from steel for safety you can feel. The fully integrated steel frame is wrapped in thick engineered plastic to withstand severe crash forces. Deep, aluminum reinforced sidewalls provide excellent side impact protection, while energy absorbing EPS foam surrounds your child for ultimate safety. Diono car seats are definitely worth the weight.

  • Joy of the journey: From birth, keep your little one rear-facing longer to 40 lbs, traveling safely. As they grow to 100 lbs (10 years approx.) our long-range lifespan protects your child facing forwards. Peace of mind for you, we’ve thought of everything so you don’t have to.
  • Lovingly engineered: The radian® 3 r is fabricated using super strong automotive high strength steel, engineered into a dual spine. This unique core manages and dissipates energy and provides an unyielding structure to protect your baby. Our audible click SuperLatch system makes installation easy and quick.
  • Three’s not a crowd: For safety that fits 3 across the radian® 3 r packs all our innovative safety features into a sleek and slim design that allows you to fit three across (in most mid-size vehicles). Now the whole family can travel, together.
  • Business Class comfort: Inspired by the best European fashions, our radian® 3 r has bright soft fabric covers and a memory foam seat bottom. Lined with energy absorbing foam, comfort and safety go hand in hand.
  • Made of Seattle: We are from Seattle, a city where being different is the norm and so is the radian® 3 rX. It folds flat, so you can travel the world and is FAA approved for use on an aircraft. You don’t need to change your plans just because baby is in tow.
  • Dimensions (in): 16 L x 17 W x 28.5 H

Review Summary
116 Reviews
82% (95)
15% (17)
3% (3)
1% (1)
0% (0)
97% Recommend this product (113 of 116 responses)
By Tasha
Easy to install
September 17, 2021
Our daughter loves this seat. Comfortable and easy to install. Only con- we couldn’t figure out how to attach the cup holder.
By Denise
Shreveport, LA
Compact, solid, simple
September 12, 2021
This car seat is nice and compact to fit in a smaller vehicle, or if you need to get multiple across a row of seats. Feels safe, sturdy, and easy to clean.
  • Slim, easy to install, comfortable fit
  • Instructions were not there for installation or putting together, very heavy
Best UsesSmall vehicles, if you need 2-3 across one row of seats
By Arturo
Cary, NC
Very good site and product
August 6, 2021
I buy a couple of this car seats last year.
At the beginning I was hesitant because I didn't know this site before, but the process to buy and the delivery time was great. The car seats arrive without any issue.
This are perfect for 3 in a row. now I have only 2 of this and one Chicco, I'm planning to upgrade the chicco to one of this soon.
  • This in particular don't have any support for the head, I may try other version with head support later.
Portland, Oregon
Will be reselling
July 17, 2021
I hate this car seat. Based on the product description it seemed like it would be easy to install, but it was the opposite. When it’s in rear-facing mode it’s so long that I can’t put my front seat back very far. It also just doesn’t seem super safe for younger kids without any sort of padding/protection on each side.
By LC3124
Long Island, NY
Great seat, not so easy install.
July 8, 2021
It's a great seat, easy to manage getting the baby in and out. However, the initial installation of the seat took forever. My usually handy husband installed other car seats in less than five minutes, this took over an hour. It's just a bit tricky and can be frustrating initially.

By Sherry
Very Wide Front to Back
June 20, 2021
I got this for my husbands jeep and I have a hard time getting comfortable even with the extra lift we bought. Its notoriously heavy and my son doesnt seem to like it as much as our Nuna Rava. I will probably end up getting another Rava.
  • narrow side to side, child can hang legs over the side
  • Wide front to back, heavy, my son doesnt seem as comfortable as in my other car seat
Best Usesif you need more the one car seat in a row
By Sarah
Bozeman, Mt
Good for short trips around town
June 20, 2021
Love this seat for everyday running around town. We don’t use it for road trips because my three year old needs the headrest when he falls asleep. We bought the 3xrt model and are very happy with that for longer rides.
  • Slim design. Sleek look.
  • No headrest.
Best UsesEveryday use
By Rachael W.
Love this carseat!
June 15, 2021
Great carseat. Fits nicely and gives room for someone to squeeze by for the third row seat. Our daughter loves facing front and having her own cupholder.
By Mike
Brooklyn, NY
Works great
June 11, 2021
Easy to mount and a good size of you have a compact car.
By Nana
Great price
June 9, 2021
I needed another Diono car seat in order to put 3 grandchildren in the back seat. Albeebaby had the best price. Order arrived on time, exactly as described.
By Josh
New York
Comfortable & Narrow
June 2, 2021
The Diono seat is very comfortable for our toddler and also allows 3 to sit across (2 car seats and 1 adult)
  • Narrow
By Eddie
Miami, FL
Great quality and easy install
June 2, 2021
Doesn't get better than Diono!
By Diana
Pasco, WA
Great for families with lots of toddlers!
June 1, 2021
I have 4 kiddos under 6 years and needed slim car seats for my van. I was excited to find this carseat plus all the extra goodies that came with it! the seat protector is a must!!
By Katelynn
Brownsville, Texas
Very Sturdy!
May 22, 2021
We love this Diono seat. It is so sturdy and so easy to install.
  • Steel frame
  • Easy to install
  • Easy to adjust
  • Comfortable
  • Heavy
Best UsesBest used from birth on
By Kelli
Montgomery, Al
My favorite carseat
May 19, 2021
I love these. We have 4 now and they are the best fitting seats! They are so sleek and simple to buckle! I had 3 across easily in my Subaru Outback and now they make getting around them so easy in my Yukon XL. My kids are so much happier in these than the more bulky seats we’ve had.
By Chase C.
Great product and deal
May 7, 2021
The seat is great. It fits nicely in my truck.
By Kayla
Hemet, CA
Amazing deal
April 28, 2021
Purchased three of these. We drive a Kia Sportage and needed something that fit 3 across. These are perfect. LOVE that they had this bundle. Saved so much money and it’s good quality.
By Em
Arlington, Virginia
Slim and versatile
April 22, 2021
These are great. They have a slim profile and can be folded and worn as a backpack (with straps sold separately). This will make it easy to fly, use on the plane, and use in the car when we get to our destination.
By Julian
THORNTON, Colorado
Awesome Package and much cheaper than stores!
April 9, 2021
Great package for the car. We already had a few of these items but getting them together for the price is amazing. Kiddo loves his big boy seat and tells everyone about it. Thinking of getting a second one already for the other car.
By Kristy H.
Rochester, WA
Love 💕
April 2, 2021
Love love love car seats. I wish I would have found these when I first started taking in kiddo đŸĄ° I love that I don't have but another car seat it grows with. Plus I can put three in my back seat đŸ˜
By Kerri
March 26, 2021
Daughter loves the seat. Very slim for easy in/out.
By Sarah
Chippewa Falls, Wi
Safe & User Friendly
March 22, 2021
We love our Diono carseat! My husband & son were in an accident driving 70 mph. My 3 year old was in Diono on the side that the window was shattered and door was smashed in. My son walked out of the vehicle completely untouched. This is our third seat purchase (2 for 2 vehicles and 1 for replacement from accident). We won't purchase another brand! The material is very easy to remove for cleaning and replace when finished.
By Annissa M.
Sleek, safe, stylish.
March 20, 2021
We love these seats. We purchased two to fit in the back of a BMW and there’s room for an almost 13 year old too. These seats are easy to install, once you find the hidden book. It’s inside the fabric shell in a pocket on the backside.
No complaints and I love the high weight/height limits! We will gladly use these for years to come! Shipping was fast and prices were great!
By Lindsay R.
Buffalo, New York
Great deal for this car seat and bonus pack
March 12, 2021
Extremely fast shipping. Received in less than 48 hours. We already had this car seat and knew we wanted another. I was happy to find this bundle deal. It's a great car seat for our 3 1/2 year old.
By Audreanna O.
Warrensburg, Missouri
Love these for 3 kids!
March 11, 2021
We have three kids and their seats didn’t fit the way I liked so we switched to these and it’s great! I have a Dodge Journey and have two rear facing (ages 14 months and 2.5 yrs) and my FF (5 yrs) in a 5 point harness. I love everything about them!
  • Slim fit, design, color, stylish.
By Madison
Great sturdy car seat!
January 27, 2021
I really like this because it’s not bulky and super easy to fit three along my back row in my car.
  • Compact, sturdy
  • Talk back in rear facing
By Philip
Overall a good carseat
January 16, 2021
I like the car seat you buy it . We had trouble finding a car seat that would work with our Ford airbag seat belts. We looked everywhere to see what would work with our car. I finally called a local baby store and they said this brand would work with the car seat belts. It does take up a little too much room rear facing though but I would still purchase it again.
  • Rear facing up to 50lbs.
  • Easy install
  • Can use with newborn if you buy the xrt model
  • Big and bulky
  • Weighs a ton
By Jenny
San Marcos, ca
January 4, 2021
This product is true to the description and very sturdy. My 4 year old petite daughter loves this car seat
By Anonymous
Great car seat!
December 25, 2020
This is a well made car seat! Very heavy!
By Renee
Best carseat ever!
December 14, 2020
This car seat is amazing!! We own 4 (2 in each car) and we bought 4 for the grandmas! We’ve tried tons of car seats and this is our all time favorite. It’s easy to get in and out, easy to buckle and unbuckle. The straps don’t get tangled, and it’s heavy duty so it doesn’t feel flimsy or wobble around. Highly recommend!!
By Jeremy
My 3rd one
November 22, 2020
I love these car seats , the 2020 version even has a cup holder add on
By Ruth H.
Senoia Georgia
Solid narrow baby and child seat
November 21, 2020
This seat is made with metal so it is very heavy. It is the most solid seat I have ever seen. Also because it is So much narrower than most seats you can fit three across easily in the back seat of my Nissan Pathfinder. It is very easy to take apart and clean completely, easy to adjust and in my opinion the most practical seat I have ever used. I will keep my kids in it and can until they are ready to be in the regular car seats.
  • Narrow, Easy to Clean, Easy to Adjust, you can easily fit three across in the back seat of a crossover vehicle
  • Heavy
Best UsesWhen you do not have to move it from car to car. When it can be placed and stay there.
By OhioNanna
Great product as ususal
November 12, 2020
This is our 3rd Diono and the first time for the Diono Radian 3R. We are using it with our 3 year old because she didn't need the infant support from the RX one. So far we are just as pleased with it as our other purchases. Thanks to albee baby for great prices and easy shopping as well. You feel like your children or grandchildren in our case will be very safe with these carseats. However, they are not ones you change or move around all the time. They are too heavy for that. We put them in our cars and just don't move them very often. We make sure to have at least one in each car.
Palm coast, Florida
Comfortable and Sturdy
November 10, 2020
Great carseat. Heavy and sturdy. My son seems to be more comfortable in this seat than in his other as he has more space to spread his legs since the sides do not come up as high. It was also easier to install than our other carseat. I plan to purchase another one for Grandma's car.
By Grammy
Just what I needed
October 29, 2020
With grand child #5 needed car seats for 3 older kids to fit in van. This was just what I needed. They are heavy so needed Son in law to get them set up.
  • Can fit 3 across
  • Too heavy to move between cars
By Sarah
Rancho Cucamonga, Ca.
Great Car seat
October 15, 2020
This car seat has a great sleek look and very versatile when it comes to growing with your child.
By hui C.
Hard to decide on the stars
August 28, 2020
Bought this car seat for my 4yo, he seems to like it very much but not so much for me. I have to reinstall the carseat to remove the cover for wash, or to adjust the harness. It's kind of heavy labor considering the heavy steel frame of the carseat.
  • Sleek design, perfect fit with our old pria85.
  • Storage block for all the parts and accessories
  • Top on safety rating
  • Excellent customer service
  • Difficult to adjust harness and remove cover
By cindi
great seat, strong, made well and comfortable...
August 22, 2020
i bought this for my great grandson and we love it.... he loves it too... its very comfy for him and built strong.
right out of the box he was climbing in it to check it out... we got it at a great price as it was on sale... very happy with our 3RX ! great seat.... thank you!
By Brittany
West Jordan, Utah
Love this car seat
August 19, 2020
I wasn’t sure at first because the pads on the straps are THICK. But after using it for a few months, I’m definitely a fan.
By Luxur S.
So glad I got this!
August 9, 2020
I am so glad I went with this car seat!

It super easy to use, it took maybe 4 minutes? I have two under two and it was simple to install and no fuss when I load up the kids. They enjoy it and it fits great in our small city friendly compact car. Would buy again and have already recommended this brand and STORE to my friends â¤ď¸
We didn't use it yet
July 31, 2020
my daughter loves the colors. I had got this car seat for traveling. It's cool that it folds. I brought the straps to go with it but it's still heavy so I'll have to buy the traveling car seat bag with the wheels.
Sarasota, Florida
Perfect for smaller cars
July 27, 2020
Works like a dream to get 3 across. Would recommend getting the angle adjuster for optimal safe usage
  • Slim - their primary USP
  • Less frills, but does the job
Best UsesMulti kid families
By Gemma M.
New york
Great car seat
July 25, 2020
Comfy and stylish and fits great in my car highly recommend
By Kara
Monterey, Tennessee
Great Carseat- some limitations though
July 16, 2020
We liked this. It met the purpose we had- being slimline. However in the forward facing position my children always were found with their heads tipped forward where their airways can't safely be kept open. This was very bothersome for them and for my mom heart! I wish it had a reclining option for forward facing seats. Some vehicles have natural recline in their seats and some don't. I see this being perfect in most cars.
By Olivia
Port Charlotte, Florida
Not Heavy, Built Great
July 16, 2020
We have been looking for car seat specifically so we could do 3 across and these are perfect. I saw many reviews about them being incredibly heavy, but they are only 22 lbs which is less than the other car seats we have owned.
By Beth s.
Colorado Springs, Colorado
Narrow and solid but complicated
July 16, 2020
I really appreciate a few things about this seat. It is narrow yet roomy inside for comfort, the fabric is nice, the straps tighten easily and it's really, really solid. There are only a handful of seats that can fit three across and this is one of them. That said, it is so complicated compared to other seats! So many rules/settings for different weights, the crotch buckle must be in this slot for this size kid, safety stop must be used for these kids, the base has to be in this setting using this release lever, etc etc. I know it’s all because of safety but my concern is that due to the many, many rules that it may be set up incorrectly and therefore LESS safe than a different seat. It is also quite difficult to get tight enough using latch. Competitors have a much better latch systems. Also, it is enormous front to back when rear facing. Now that it's in (use a seat belt) I like it but getting there was a challenge.
  • Solid construction, fits three across, nice fabric.
  • Poor latch system (hard to tighten) and really large front to back.
Best UsesForward facing unless you drive a bus.
By Monuca
Moorhead, Minnesota
Great car seat
July 12, 2020
We have 4 Dionos and have been very happy with them.
By Katie
, Oklahoma
Heavy and Tall but Great Space Saver
July 6, 2020
This car seat is heavy, but once we got it installed we haven't moved it, so the weight wasn't a big deal for us. I wouldn't want to be moving it from car to car regularly though. We have twins and a toddler who are all in convertible car seats and our toddler wants to be in the same row as his sisters, so we have 2 of the Diono Radians and a Graco Contender 65 all across the middle row of our Kia Sorento. They fit perfectly. The twins seem to be comfortable in the seats and I love that they can all fit in the same row together. The only downfall of these seats is that they aren't adjustable height and they are very tall. Our twins are still rear-facing and currently to be able to access our 3rd row without taking a car seat out, we have to have our son's front-facing car seat behind the passenger seat, which leaves the twins rear-facing in the middle seat and behind the driver. The rear-facing Radian in the middle is so tall that it makes it almost impossible to reach over the seat into the back row to hand out a snack, find a dropped pacifier, etc. Only a minor annoyance and really only a problem on longer car trips. Overall I love these seats!
  • Comfort
  • Space-saver
  • Heavy
  • Tall and not adjustable-height
By Mikeylikey
Great product. Rear facing disappointment.
July 5, 2020
The seats are incredibly well constructed. I have two other all in one car seats I’m my wife’s truck and they are just plastic behemoths. These are streamlined and compact and surprisingly heavy. They have a variety of mounting options to suit any application.

My only complaint; when in a rear-facing position it is incredibly reclined. So much that my passenger seat has to go all the way forward to keep the metal frame from imprinting the leather headrest. This is inconvenient because they are touted as space savers and my backseat isn’t small by any means. But, it’s not a minivan (which is what I’m thinking they used to design these).

That being said, forward-facing is great. I bought two and the space in between the seats is enough to fit a piece of luggage. We do a lot of road trips for camping and every gained is worth it’s weight in gold. Overall very happy. The rear facing setup has a removable base to cause the recline I might take that off and just use the standard recline function. Between that and the tether, it’ll be much safer than being unable to be level due to seat interference.
  • Compact, durable, super comfortable straps and a very easy seatbelt tightener function.
  • Rear facing is incredibly inconvenient with a ridiculous recline angle. Maybe just a tad too heavy, but that?s probably a pro and a con.
Best UsesProbably large vehicles if you do rear-facing. My midsize truck lacks the depth to allow the full recline of the seat in that mode. If your kids are over two or meet the requirements, forward facing is where it?s at.
By nicole
love the car seat
July 3, 2020
The only stimulation we have is the pad for the straps are a little big too much as the baby becomes a toddler.
  • love it
  • wish it had extra shoulder straps for toddler

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