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Diono Radian RXT Convertible Car Seat - Black Mist

Share Diono Radian RXT Convertible Car Seat - Black Mist

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Coordinating Items
Diono Radian Carry Strap
Diono Car Seat Travel Bag
Include the Diono Radian RXT Convertible Car Seat - Black Mist



Rear-facing Capacity: 5-45 lbs
Forward-facing Capacity: 20-120 lbs
Seat Weight: 26.15 lbs
Seat Dimensions:28.5 H x 17 W x 16 D

What's Included: Cup holder


Steel Frame

Full steel frame and aluminum reinforced sides for unmatched safety.

Fit 3 Across

Comfortably fits 3 across in most mid-size vehicles.

Fold & Go

Folds flat for storage and travel - you can even take it on the go with handy carry straps (sold separately).

FAA Certified

Travel-friendly and FAA certified for aircraft use!

Your child’s security is Diono's top priority. The Radian rXT 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.

The radian® rXT keeps children comfortably rear-facing from 5-45 pounds for the safest possible position. Premium, plush head and body support cushions are included for newborns and infants.

Accommodates forward-facing children up to 65 pounds in a 5-point harness and converts to booster mode for kids 50-120 pounds. The aluminum reinforced, adjustable head support and sidewalls provide additional side impact protection.

Diono 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.

  • Premium, plush interlock knit fabric (available in Black Cobalt, Black Mist, Black Plum, Black Scarlet and Essex colors)
  • Full steel frame for unmatched safety
  • Comfortably seats rear-facing children from 5-45 pounds
  • Seats forward-facing children from 20-65 pounds in a 5-point harness
  • Converts to a booster for children from 50 pounds up to 120 pounds, and up to 57? tall – proper fit in booster mode
  • Unique SuperLATCH™ system makes installation easy
  • Fits 3-across in most mid-size vehicles while providing spacious interior for child
  • Folds flat for travel and is FAA certified
  • Infant body support cushions and memory foam add comfort
  • Aluminum reinforced sides with energy absorbing EPS foam additional side impact protection
  • Safe Stop® energy absorbing harness
  • 12-position adjustable headrest
  • 5 shoulder and 3 buckle positions adjust for a comfortable ride.
  • Rear-facing tether capability
  • Expandable sides and long seat bottom offer proper leg support
  • Low-sitting profile makes it easy for your child to board
  • Angled cup holder keeps drinks upright and within easy reach
  • Cover is machine washable
  • Rubber bottom grips for no-slip installation
  • 10 year life from the date of purchase

out of 5.0
981 Reviews
Ratings Snapshot
5 Star
73% (716)
4 Star
20% (201)
3 Star
3% (26)
2 Star
2% (23)
1 Star
2% (15)
of Reviewers
Great seat if you need to fit three car seats in one row
By Chris
from Waukesha, WI
on June 8, 2014
Verified Buyer
I have a four year old and twin 1 year olds. I originally bought two rear facing only seats for my twins (had to do some research to find three that would all fit in my car). Now that I moved my twins to forward facing I had to purchase another two seats for them that would fit along with the booster I have for my four year old. These seats are narrow enough to easily fit three across either forward facing OR rear facing. I have one fairy wide booster seat + two Radians and while its a bit tight, it easily works. I've also moved all three to different cars and it fit all of them without issues. If I had three Radians it would be even be easier (since my booster is a few inches wider than these seats). My kids like the seats, seem comfortable to them, and are easy to buckle them in with. I didn't try rear facing with the kids in them, but I put them in the car just to see and space was ok that was too. I currently have 10 car seats including my two Radians, and these are one of the easiest ones to install of the bunch.If you are looking to fit three kids in a standard car (I have a Tucson and an Altima), I would recommend going with these. My only regret is that I didn't purchase these originally instead of buying separate infant carriers.
  • fits three across in a standard size vehicle (Camry, Fusion, Altima, etc). Rear facing OR front facing.
  • Easy to install
  • Easy to buckle children in
  • Seems comfortable
  • nothing I've noticed
Nice seat
By Torrey
from Scottsdale, AZ
on May 28, 2022
Verified Buyer
My daughter loves her diono car seat. We go on lots of road trips and she says its a comfortable ride. Also slim and makes sitting in the back with you comfy too. From what Ive researched its a very safe car seat! We have 3 diono car seats and I recommend them to everyone!
Love this car seat
By Shantel
from Denver, CO
on May 3, 2022
Verified Buyer
We love this car seat so much. My only complaints are that it is extremely heavy and its not very easy to clean. But, its a car seat and does not leave my car very much. We have 3 of these and will likely purchase another as we are expecting baby #4.
  • Safe
  • Durable
  • Slim
  • Heavy
  • Not easy to clean
Great quality
By Karen
from Illinois
on April 28, 2021
Verified Buyer
The design is good and the quality is good. We wish the installation could be made easier. I like that it be can be converted into a booster once weights reaches 50 lbs.
Great for putting multiple children in a row
By Kayla
from OHio
on October 14, 2020
Verified Buyer
We searched and read so many things about car seats. We are happy with the Diono Radian RXT and Albee baby had the best price we could find. We ordered two one for each car. The reason we went with the Diono was because of their safety rating and that it was versatile. We have a tendency to have small babies in our family and they outgrow because of height more than weight. The Diono offers us confidence that if in a wreck the babies will be safe. I would recommend checking out the videos on how to put the carseat in the car and also considering the wedge if your child is going to be rear facing. We bought the wedge and it was totally worth it for us. Now she is older, almost 3, we have turned it around and she never complains about the seat and has no problems on long drives. I would recommend it for sure. Wish I could give it more stars. We LOVE it.
  • Safety, comfortable, doesn't take up much room, easy to use buckles, 3 way harness, can attach different ways depending on the car, good quality.
  • you need to read the instructions or watch the video to make sure you have it installed properly, Think the wedge is needed if you are using in the rear facing mode
Happy with Diono car seats
By Mommaof7
from SLC, Utah
on June 19, 2020
Verified Buyer
While this particular Diono is discontinued, I was happy enough with this car seat to purchase a second one and am very happy with both. Slim and comfortable, and heavy duty.
  • Slim, comfortable, safe
Great sit to fit 3 across
By Monuca
from Moorhead, Minnesota
on May 6, 2020
Verified Buyer
Our kids like the seats, they are comfortable.
Great seat - we needed three in a row
By Monuca
from Moorhead, Minnesota
on May 6, 2020
Verified Buyer
We have been very pleased with this seat. It fit three in the back of our town and country. The kids say it is comfortable.
Great Seat
By Mary
from Pennsylvania
on May 4, 2020
Verified Buyer
Sturdy and well made. This will last for a long time.
  • On the heavy side; but this is also a pro as it is very strong and safe
Great carseat
By Kayla
from Hubert, North Carolina
on April 20, 2020
Verified Buyer
My 4 year old enjoys this seat and find it very comfortable. I like that the seat fits easily in the center seat in our car where most other seats wouldnt fit.
Great carseat!
By Hannah
from Calais, Maine
on April 19, 2020
Verified Buyer
I love how narrow but comfortable this seat is. It was easy to adjust and install. I can finally fit two carseats and a person in the back seat again!
  • Narrow
  • Comfortable
  • Fits in a Nissan Altima
Great seat
By Meg
from Lafayette la
on April 12, 2020
Verified Buyer
I love it so much I bought my new baby one too
By J R.
from Laurel, MD
on January 23, 2020
Verified Buyer
This is the car seat you need. Look no further. Outstanding. This is our second purchase of the same car seat, so we now have two kids using the same model seat: 2.5 y/o forward facing, and 1 y/o rear facing. No complaints whatsoever.
Small footprint
By St
from SC
on January 16, 2020
Verified Buyer
Great safe seat with a small footprint if you do not have huge seats in your car! Recommend
Awesome car seat for all ages!
By Fence007
from Minnesota
on December 20, 2019
Verified Buyer
We now own three new ones and two older ones for our three kids and two cars and could not be happier. Easy to install. Last 10 years! and easy to clean!
Thank you
By Elvin
from Korea
on December 12, 2019
Verified Buyer
Thank you fir your quickly delievery.
This seat is very substantial.
Love this car seat!
By Jthyden
from Syracuse, NY
on December 2, 2019
Verified Buyer
This love this car seat so much that when we had another child we bought another two for multiple cars! It is heavy, but I love that it has a steel frame which to me means safety! Super safe but also a slimmer design so you can put 3 across which is a plus when you have multiple kids and not a ton of space in the back seat. This is a quality item and so worth it when it comes to keeping your little ones safe and comfortable on road trips! It will last their entire childhood (Car seat/booster years) since its rated up tI 120lbs. So for me it was with the investment in getting several of these car seats. Love my Diono!
Good but not great
from Colorado Springs, CO
on November 14, 2019
Verified Buyer
good but not great. Sturdy construction. Quality compares to the higher end Britax seats weve had, which is hands above any Graco product (for comparison). Bought this as an all-in-one car seat because it is so adaptable, and weve seen many changes in the last 10years of having kids.

Very versatile
Customizes to all different sizes of children
Quality is great
All in one, so no more car seat buying
Narrow, so we can usually fit 3 across

Installation is not as easy as Britax click-tight car seats. In fact, installation could be difficult in some vehicles
Putting in a middle seat position is still tricky
Very long front-to-back in rear facing position, even though its narrow
Cant fit 3-across when used in conjunction with our Britax (but thats because the Britax is a monster)
  • Lasts a really long time, quality build, grows with all stages across childs development, narrow
Best Uses
  • Three across or multiple children in one car
  • Stays in one place and one car after installation
  • Installation somewhat difficult
  • Car seat is heavy
By Irene
from San Jose, California
on November 6, 2019
Verified Buyer
This chair is narrow and tall which means you can fit 3 chairs in the backseat. I like the color and quality of this chair. Great value.
Diono car seats
By Amber O.
from Illinois
on October 9, 2019
Verified Buyer
I love the seats and they came very quickly
Comfortable carseat
By Jian
from Driftwood, Texas
on October 8, 2019
Verified Buyer
My daughter turned to 2 and we decided to upgrade her car seat. She likes it very much. You can tell there is much more space and very comfortable. Will definitely buy one more for my son.
Super nice
By Aliona
from Minneapolis, NN
on October 7, 2019
Verified Buyer
Super nice easy to install.
  • H
  • Heavy
By Kira
from Salt Lake City, Utah
on September 27, 2019
Verified Buyer
This is the 5th car seat we have purchased over the last few years and we bought it mainly based on size reviews. This is a very narrow carseat compared to others we have used (Graco and safety 1st being the other ones). We have it rear facing for the next few months until our child is large enough to be forward facing. We have it in our van and there is barely enough room to fit it behind my seat. It would not fit behind my husband's as he needs the seat all the way back. It is HEAVY though. Be aware. It is not a seat you want to be transfering often from vehicles. It was very easy to assemble. Took maybe 15 minutes, and the straps will be simple to adjust as child grows. We are very happy with the purchase and will probably buy another one to replace our other child's seat because of the narrow size.
  • Easy assembly and install. Looks to be easy to remove cover and clean as well.
  • Not ideal as a transfer car seat from car to car as it is heavy and bulky to carry. However it does fold up for carrying.
Sturdy but difficult
By Adrien
from Bismarck, ND
on September 24, 2019
Verified Buyer
I dont recommend for rearfacing. It takes up a lot of room front to back so my husband cant deive my car.
Forward facing is great, and I like how long the seat lasts before expiration
Great Seat!
By Meg H.
from Atlanta, GA
on September 20, 2019
Verified Buyer
I am very pleased with this seat so far. It is big, but the angle adjuster did help to give me a little more room up front. A lot of folks complained about the install, but I didn't have much issue - I read the directions and got everything set up before hand, and it just takes a little muscle but not really more than I was expecting for any seat. My baby seems to like it. He use to get upset about being in the infant bucket, but he seems to feel less pinned down in this due tot he lower sides and he can look around and see out the window well. Because of the lower sides, I don't have to adjust the harness as much to get him in and out.
Love this carseat!
By Kaitlin
from Wilmington De
on September 18, 2019
Verified Buyer
I love this carseat so much. I love that it is slimmer than most and less of a "bowl" to put your child in, making it so much easier to get my son in and out of it. I also love the ratchet tightening function as well so I dont have to struggle as much to tighten the straps. I bought this carseat for my first son and when it came to my second son, it was the easiest decision to buy a second one. I highly recommend this seat!
  • Easy to get your child in and out
  • Easy to tighten and loosen straps
  • Slim profile
  • None
Our favorite car seat!
By Miller
from Oklahoma City, Oklahoma
on September 13, 2019
Verified Buyer
For the last three years weve had Diono Raniers and absolutely loved them. Baby number three is due in November so we ordered these seats to be able to fit three across in our Dodge Journey. Weve not gotten much use out of them yet but our experience with Diono seats and products has been amazing. Easy to clean and great diono brand extras like seat protectors and angle adjusters. They are a little long front to back in our vehicle when rear facing without the angle adjuster, but with it my husband and I (510 and 54) can ride comfortably. We wont use our third seat until the baby is a bit older but we were able to still manage 2 of these seats and an infant carrier and it all fits perfectly. Our three and four year old kids love their new seats as well. They arent the least bit cramped even though these are a bit more narrow than the Raniers. Highly recommend Diono!
Love it!
By Aleksandra
from Midland, Texas
on September 11, 2019
Verified Buyer
Very easy to install! My 5 year old can still use the harness, and theres room to grow! I wish I bought this car seat when he was an infant it wouldve been the only one he needs! Definitely recommend, especially if you need a narrow car seat that is comfortable for a child!
Wont buy another brand
By Taylor
from Mason city iowa
on September 11, 2019
Verified Buyer
This carseat is beyond ny expectations. For a compact car, THIS IS HEAVEN! it is very heavy, if you move it from car to car i wouldnt choose this one. I got this one to stay in place in my car, her old one we move around because its a lot lighter.
I finally feel like she is actually safe in the car. Lastly, getting her in and out of the seat is alot easier also.
  • Small size
  • Very sturdy
  • Seems safer than normal
Best Uses
  • For compact spaces
  • For safety
  • For peace of mind
  • Not a breeze to install
Great quality, sturdy and lightweight
By Christine
from Petaluma, CA
on September 8, 2019
Verified Buyer
I've had the Diono R100 and loved it before but they don't make them anymore. I went with the upgraded replacement which is the RXT and it is the same frame plus added side head support. It is also still narrow enough to fit 3 side-by-side which I need! I bought 3 of the same and the 3 kids are comfortable and the youngest is still rear-facing in the same seat, but we'll remove the base when we turn her around and will have 3 identical seats, all sturdy and comfy!
By Melanie
from Arlington TN
on August 30, 2019
Verified Buyer
Fantastic car seats! Durable, safe and not bulky. Very satisfied!!!
Love this brand
By Katie
from Plainfield , In
on August 25, 2019
Verified Buyer
Love this carseat. When it came time to replace/purchase an additional car seat for our family this is the only brand we would consider. They are really heavy, but so easy to install and slim fitting to allow maximum positioning within the car.
  • Easy to install, sturdy
Best Uses
  • Needed something that would work for my older (6) older, petite daughter and also work for our toddler. This was a perfect harness seat to allow us to keep our older child in a harness and yet still work well for our 2 year old too.
  • Weighs a lot but quality and ease of installation make up for it.
This is the fourth!
By Tabitha
from Ligonier, PA
on August 3, 2019
Verified Buyer
This is the fourth seat we have bought like this, who can beat having a steal frame? The safety these seats provide for our kids is unfathomable and I'm so happy my husband found them in a magazine while I was pregnant with our first!
  • Lifetime seat
  • steal frame
  • rear facing for so long
Best Uses
  • children, generally ;)
Love it!
By Joana
from Hobbs NM
on July 15, 2019
Verified Buyer
This seat is absolutely the best car seat Ive bought. Its so pretty and soft and most importantly super safe. Have 5 kids cant wait to buy them all one.
Absolutely love
By Sandra
from California
on July 5, 2019
Verified Buyer
Best car seat. Perfect for traveling
By Jessi
from Clarksville, Tennessee
on June 3, 2019
Verified Buyer
These seats are great! I love the look and features. Most importantly, they stand up in a crash. I was hit in my rear side door (where my daughter was located) and the rear tire. My daughter slept through the impact and was unharmed. I wouldn't put my kids in any other seat!
  • Sturdy
  • Fits 3 across
  • Heavy to move
Perfect to Fit Three
By Melissa
from Chepachet, RI
on May 21, 2019
Verified Buyer
We have three kids under 4 and we both drive 5 passenger vehicles. Love the easy install, ability to extend RF, and safety features of these seats. I have 5 of them.
Love this seat
By Melissa
from Chepachet, RI
on May 21, 2019
Verified Buyer
I already have two of these and needed another for the baby. Love the color and the fabric on top of all the safety features that sold me the first time!
Perfect Fit
By Melissa
from Chepachet, RI
on May 21, 2019
Verified Buyer
When I was researching convertible car seats I was looking for safe, lasting, and able to fit three across. I narrowed it down to three seats and ultimately choice these and am so glad I did.
Great car seat
By Betsy
from Indiana
on May 20, 2019
Verified Buyer
Love this car seat. Easy to install. My 3 year old is still rear facing and doesnt complain about comfort. Great when you need narrow seats. Only con is its really heavy so wouldnt recommend if you have to move the seat often.
Favorite Car Seat
By Christiane
from Vienna, Virginia
on April 26, 2019
Verified Buyer
I work in car safety research so besides a safe car I am always on the lookout for the safest car seat. This seat has really great reviews from people as well as the industry. We do not have the biggest car so this seat is great if you need to fit three across or if you need to keep two seats side by side so that one more adult can fit in the back. My son looks comfortable in the seat as well. Albee Baby has the best price on this seat and the rewards program is the best. Highly recommend!
  • Slim design and safe
Best Uses
  • This car seat can fit three across
Great compact car seat
By Catherine
from Eden Prairie, MN
on April 24, 2019
Verified Buyer
Our friends had recommended trying these so we could get three car seats across in a small car. These fit perfectly and its pretty easy for our almost 3 year old twins to get in and out of. Plus, the product was cheaper here compare to competitors. Would definitely recommend, especially if you are looking for car seats for a more compact car!
  • Fits in compact car, easy to buckle in
Love these seats & so do our girls!
By Stephanie
from Midland, Michigan
on March 31, 2019
Verified Buyer
We love the Diono Radian RXT! We purchased due to its slimness and needing 3 seats across. The material is soft and comfy, the seats are super strong and durable feeling and theyre really easy for our girls to climb in and out of. Our girls prefer these over their previous Graco.
  • Comfort. Design. Durability. Strength.
Best Uses
  • 3 across.
Obsessed doesn’t even cover it
By Samantha
from Washington
on March 23, 2019
Verified Buyer
Ive been buying Dionos ever since my oldest (now five) has been two and I cant imagine our lives without them. Theyre incredibly sturdy, safe and within a decent price point as far as car seats are concerned;I love that theyre slim enough that I can fit three across in my suv or in my husbands smaller car if need be.
  • Safe
  • Compact
  • Price
  • Durable
  • Easy Install
  • Heavy
Liked it so much, we bought two!
By Dennis
from Schertz, Texas
on March 15, 2019
Verified Buyer
This is a very versatile, very comfortable car seat. Our 4 year old still uses his and we bought another for our 7 month old because he's growing out of his smaller seat. The removable infant cushions are a great fit for him. Straps are comfortable with a very soft padded cover on the harness. The only downside is that it is quite heavy to carry, but we only do that when we travel by air. The heavy steel frame does mean great safety, though. Highly recommend!
  • Versatile
  • High strength steel frame
  • Comfortable
  • Heavy
Love this seat!
By Mary
from Delaware, Ohio
on March 14, 2019
Verified Buyer
We absolutely love this seat! It is sturdy and safe for our son and perfect for the backseat of my pickup truck. We are due with baby #2 any day now and the slim design of this seat will allow the baby carrier to fit nicely next to it and eventually another Diono!
Three across, Best for the Money
By Jann E.
from Montana
on March 2, 2019
We drive a Ford Focus which is, in my opinion, only a medium sized car. The choice was between buying a new car or two Dionos when we had our third child because there was NO WAY we were getting a third seat in with our daughters previous booster. Although Dionos may be one of the more expensive car seats out there, they certainly are cheaper than a new car! We still are able to use our original infant carrier with the two dionos but I like these so much I will likely be purchasing a third eventually. Theyre solidly made and have the most room to grow Ive found, especially for rear-facing, and Ive done a lot of research. I like the side impact head rests as most children are killed or injured in side impacts, and also they make sleeping easier for the child as their head wont rock forward as easily. Best bang for your buck and cheaper than Amazon even on this site!!
  • Narrow and large age range, able to rear face for very long. Fits three across, best quality you can buy
Best Uses
  • Families with more than two children (or are planning on more than two eventually) or anyone who cares about buying the best safety for their child due to the high quality and rear-facing abilities.
  • Heavy, top heavy/tips over (when free standing), some people with larger hands may have more difficulty with the install
Great seat
By Nicole
from Marysville, IN
on February 27, 2019
Verified Buyer
I never used these for rear-facing, but for forward facing they lasted quite a while even for my tall boys. We kept these in Grandma's car so they were not used daily, but they were easy for my boys to Buckle in and out and I felt they were very safe in these. Plus the colors are great!
Love the size
By Nick
from ephrata, Pennsylvania
on February 25, 2019
Verified Buyer
We loved the size of this seat for our car. Easy install as well.
The best!
By Elaine
from Massachusetts
on February 24, 2019
Verified Buyer
Loveeee these car seats! Very confident they keep my children safe and secure!

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