Diono RadianRXT Car Seat Review
Diono creates travel safety products for children including a line of top quality, award-winning car seats. Their seats feature a steel frame and superior side-impact protection along with the highest weight capacities on the market. Plus, their car seats exceed federal standards!
With my 4th child on the way and growing youngsters, car seats an important topic to me. I have to watch expiration dates, make sure they are properly installed, check the weight limits, and even try to fit several seats across crowded back seats. With Diono’s RadianRXT Car Seat, these common concerns are simplified!
This one car seat can do it all from a rear-facing infant as small as 5 lbs to a 5-point forward facing harness seat up to 80 lbs and then continued used as a booster seat up to 120 lbs! The RadianRXT seat also features a 10 year life range, meaning it will last as long as your child needs to ride in a car seat! Plus, the RadianRXT seat is ultra slim both in width and depth giving you a great fit in small cars and for a 3 across the back seat scenario!

When I was searching for car seats when my oldest needed to move from his bulky convertible car seat to a slimmer seat to make room for my second child, I searched and read tons of reviews to find a great car seat we would love. I finally settled on a Radian80 (no longer made) which we have owned and loved for 3 years now.
It is a similar seat to the RadianRXT, but things have only gotten better with Diono’s Radian line of car seats! They took everything I love from my Radian80 car seat and improved on it! I am seriously amazed by how awesome the RadianRXT seat is and couldn’t be happier! Some of the improvements I love include the removable cup holder, side “wings” of the seat that fold out for a wider and roomy seat area when needed, higher weight limit, booster seat ability, and more!
I also love that my rear facing 21 month old has SO MUCH more room than in his previous bulky convertible seat! His legs aren’t cramped and uncomfortable and the low profile allows him to see out of his seat much better. The attachment base for rear facing also fits our van benches like a dream so I didn’t have to fiddle around at all with trying to get the positioning right and installation was really easy.
There are a few small steps needed for switching the car seat from rear facing, forward facing, and booster positions, but even then it’s pretty quick to make the changes. My favorite thing which I absolutely love is that the RadianRXT can be used with all 3 of my boys and their different sizes and needs! This is a HEAVY car seat because of the steel beams, but even still, I absolutely recommend this car seat!!

You can find the Diono RadianRXT Car Seat available on Diapers.com, Sears and on Amazon! It has a suggested retail price of $339.99.
Disclosure: I received a Diono RadianRXT Car Seat in exchange for my honest review. I was not compensated in any other manner. The opinions expressed above are my own and any claims should be verified on the sponsor’s site.

I love the expandable sides and the large weight limit
I’d be stoked to win!!! 聽I’d love to never have to buy a car seat again-and to have such good ratings!
I like the聽 5-point forward facing harness
The steel alloy frame, reinforced sidewalls, adjustable head support and our patented SafeStop庐 energy absorbing harness.
I like that it can be used from 5lbs up to 120lbs – Thanks!聽
My favorite feature is the 5 shoulder and 3 buckle positions for custom fit.
[email protected]
not much not to love … i guess mostly thatit can grow with child and still surround them with comfort
My favorite feature of the RadianRXT Car Seat is the removable cup holder.
I like that it is rear facing up to 45 pounds.
julie hawkins
So convienient!
I like that it can be used by such a large range of ages.
like 5 shoulder and 3 buckle positions for custom fit
I like that it has聽12 height positions for adjustable head support聽
love that is goes up to 80 lbs, I have a tall and big boy that needs this
I like the 10 year life range!
I love the low profile of it. Good for smaller cars.
It stores flat for travel is my fave feature.
I like that you can use it as rear facing, forward facing, and a booster up to 120 pounds!
The cup holder is always a plus. I spend too much time trying to reach back and catch the cup rolling around! LOL
Folds up so easy to store. That is impressive.
I have a nice convertable carseat but it is for one and up….this is nice that it is from birth and up.聽
I like that it goes up to 80lbs its tough to find a seat that goes that high.聽
love how long it will last!!!
I like that this car seat grows with your child. 聽The only one you will need!!
I love that it goes to 80lbs!!
jessicaahays at hotmail dot com
Love the high rear facing limit (and the plum color!!!)
I love that is goes up to 80 lbs, I have a tall and big boy that needs this.
I like that it will be the only car seat you will need. I wouldn’t have to buy another one.
I love that you can wear it like a backpack.聽 Such a great feature for traveling.
I love that is goes up to 80 lbs! This will last for many, many years!
My favorite feature is the life span of the seat with the fact that it can RF to 45lbs and FF with a five聽 point harness for so long!
I like how narrow they are.
I think the greatest feature of this is the fact that this is from newborn to 120lb (booster). That is HUGE, talk about an investment worth itself!! The ONLY carseat you would need!
I like the adjustable head support, reinforced for complete side impact safety
i like the聽 Energy-absorbing EPS foam panels on all sides
聽Steel alloy frame and aluminum reinforced sides
my favorite feature:
Steel alloy frame and aluminum reinforced sides
susansmoaks at gmail dot com
聽it goes to 80lbs.
I love the聽
12 height positions for adjustable head support and memory foam padding聽
Extra cup holders!
Wow聽— 聽it folds flat for travel and storage, has a 10 year life and holds up to 120 lbs,聽 big kid!
you can add聽Add up to 4 cup holders聽
I love the higher weight limits and added safety
awesome that it folds flat
My favorite part of this seat is the head rest. I tried my daughter in this seat in the store. The head rest is angled to help her head stay upright.聽I love that because it always stinks when she falls asleep and her head falls forward.
I like that it can rear-face and then booster for so long for the kids. The longer they can wait to make that next step up, the safer for them.聽
I like the stability of steel beams.
I love how the seat converts as a child grows.
love that it accomodates kids from 5 pounds to 120 pounds
I like how compact it is and that it’s good up to 120 pounds!
I love that there are reclining levels.聽 I always hate when my kids falls asleep and their heads are just hanging there, it looks so uncomfortable to me.
thank you for the chance to win!
i like that it has a 10 year life聽
Up to 120 lbs is a nice feature
I love that it has a 10 year life range!
I love how compact the seat is without sacrificing anything!
I like that it folds flat
I love that holds up to 120lbs. That is amazing!
you can add up to 4 cup holders聽
i love that you can use it up to 120 lbs!
I like that the weight limit is so high, eliminating the need to keep replacing seats. My son just turned 3 yrs, one month ago today, actually! He’s off the charts fir height & has the corresponding weight to match. Being that of a 5yr. Old! That’s what you get w/ a mama who’s 6′ and a daddy who is 6’3″!! Thanks;)
chevsweeps @ yahoo.com
All the different ways it can adjust!
I like that it’s foldable and that the bottoms seat is longer.聽
I like the convertibility and the fact that it’s made to be strong, but my favorite feature is that the EPS foam surrounds the child’s head and body to provide complete side impact protection.
I like the seatbelt action on it
my favorite feature is the 2 recline positions in forward-facing mode
I love that this carseat trasitions with your child!
I love that three car seats can sit side by side!
I like that it converts to a booster seat once the child is past the size for a car seat.
聽Safestop庐 energy-absorbing harness system
love that its the only car seat you’ll need!
Steel alloy frame and aluminum reinforced sides
I call it momma’s peace of mind.
rendancechick at yahoo dot com
My favorite feature is that you can fit 3 of these across the seat in a mid-sized vehicle.
聽5-point harness, then converts to a booster
My favorite is the Radian RXT Shadow carseat for children from 5-120 lbs!
I love the 10 year life and the cupholder!
it has a聽
5-point harness, then converts to a booster for children up to 120 lbs.
anne hill
calliope_123 at hotmail dot com
I like that it has 12 height positions for adjustable head support
i like the infant body support cushions
聽I love that it has Adjustable head support
I love that you can add cupholders!
I love that you can fold it down when you’re not using it, and I think it great that it has components such a a cup holder for a child to put their drink
What an awesome carseat I love that it is less bulky(you can fit three in a midsize car) & that you can fold it flat for storage
聽I love that it has Adjustable head support, reinforced for complete side impact safety.
my favorite feature is Adjustable head support, reinforced for complete side impact safety
I love that it can rear face much longer than other car seats!!
LOVE that it holds up to 120lbs
I love that it folds flat to travel..and that is the only car seat you will need to buy ;=)
I LOVE the weight limit! It’s so hard to find a rear facing seat with a high weight limit. It would be nice to get my son rear facing again.聽
The high weight limit. 聽
I like that its the only car seat you ever need. 聽Also the adjustable head support
“The RadianRXT is a highly versatile car seat that could be the only seat you鈥檒l ever need”.聽 I love that it lasts for your child’s needs and you do not need to buy another one!
i love the steel frame!
I love that it is the only car seat that my grandbaby will ever need! 聽 The fact that it can be used from birth until the child is out of a booster is amazing!聽 I remember buying lots of different seats for my children as they were growing.
I love that it’s a 5 pt. harness till 80 lbs and how trim it is!
– RC name is Brittany Thomas
I ike that he seat has an adjustable headrest
I LOVE the plum color!
I like that it has 12 height positions for adjustable head support and that it fits 3 across in a mid-size vehicle and offers more shoulder space
I love that it folds flat for travel and storage, has a 10 year life and offers
amazing safety, comfort and convenience your child won鈥檛 outgrow.
聽I love the Energy-absorbing EPS foam panels on all sides. I’ve never heard of this brand but it sure looks worth trying!!聽
I love the steel alloy framing!聽 I also love that, when used on an airplane, my son would be able to use the tray table AND…his feet wouldn’t be at kicking height for the back of the seat in front of him.聽 The low profile of the seat allows this to happen.聽 Fingers crossed!!!!
this is what i need!!! 馃檪 i love that its good till 10 yrs and 120 lbs!!! amazing!
SOunds wonderful—would love to win this….but congrats to whoever does.聽
folds flat sounds great when you don’t need it聽 but low profile for the kids to get in and out of is great also
I like that it goes to 80lbs.
Due with number 2 in聽September聽and this would be great for our daughter as we plan to give her聽car seat聽to her sister. Save me money on not having to buy her a bigger聽car seat聽馃檪 Thank you for this opportunity. 馃檪
favorite feature is that it folds flat for storage and travel
We’re expecting #3 and we have a mid-size SUV (& no plans to buy a larger car) so that the Diono fits 3 across in a mid-size vehicle and offers more shoulder space would help us out greatly!
I love that it can be used to 125 lbs. I could use it. 聽
I love that it is tested above the required safety standards.
I love the large age range and the 10 year life span!
i like how versatile and how long we could use it
I like that it can hold a child from birth to 120lbs! Also that it is so narrow so more car seats can fit in a car.
I would absolutely LOVE to win a聽 RadianRXT! I have to fit 3 bulky car seats into the back seat of our vehicle and it is a very tight squeeze!
I like that it has a 10 year warranty!
I love that it will go from birth to 120 lbs.聽 WOW.聽 Great deal for sure.
I love how versatile it is!
Safestop庐 energy-absorbing harness system
i love the 120lbs feature, it will last for soo long
I realy like the expandable sides
I like that it has memory foam for comfort!
The narrowness/size because I’m about to have three in carseats.
I like that I goes up to 120 pounds!
I like how long it last- with three young kids, i will get a lot of use from it.
I like that with the booster seat it can go all the way up to 120lbs!
I like that it can be used for ten years, a child can use one from birth until they outgrow carseats!!!聽 very nice!
i like that it holds a聽
forward-facing child from 20-80 lbs in 5-point harness,
I love that this seat is a versatile seat and can go from rear facing to forward facing and can boost to 120lbs!
folds flat for travel and storage.
I like the high rear facing weight limit.
聽I like that it has Energy-absorbing EPS foam panels on all sides
聽I like that the EPS foam surrounds the child’s head and body to provide complete side impact protection
i love that it converts to a booster for extended use for older kids – awesome!
i love how it can rearface to 45lbs littleheathen9109 @ yah00 d0t c0m
Love how travel friendly it is!
I love that you can fit 3 across the back seat.
How do we know if we win?
I love the high weight limit.
I like that it is comfy for my little one in addition to being safe. Memory foam padding for superior comfort!
My favorite feature is the Safestop庐 energy-absorbing harness system
callawishes(at)hotmail(dot)com
I like that it Folds flat for travel and storage.
[email protected]
It goes from infant carseat all the way to a booster. And the steel in the construction for safety.
I like that it converts to a booster seat.
i love how it will go from newborn to booster sear it will be so nice to not need 3 different seats
I love that it RF’s to 45 lbs and boosters to 120! It will be so nice to only buy one seat this time around!
I love that it will be a seat my child can use from birth up to 120 pounds!聽
I like that its a booster for up to 120 lbs..thats hard to find in a聽convertible car seat. 聽I am also impressed that it folds for storage and transport.聽
I like that it聽 converts to a booster for children up to 120 lbs.
That it is good for ten years. What a great concept for a carseat!
I like that it has a 10 year life!聽 That is amazing – although I wonder if it would really be “safe” for that long since they’re constantly updating safety restraint guidelines
Marianna
My favorite feature of many great ones, is that it聽
聽has a 10 year life ! 聽We repurpose to other family members, and as long as it has not been in an accident feel OK doing so. With 10 years it can serve several children. Thanks!
ejrichter60 at gmail dot com
its slimmer than most seats on the market, has a 10 year life span and goes up to 120 lbs. its amazing.聽
It has a 10 yr life
I like that it sits low on the seat! My vehicle is tall, and I’m short, so getting baby girl into her seat can be a challenge!
fs4sarah at gmail dot com
it converts to a booster!
I love all the great colors and also how slim it is!聽
My favorite feature is the adjustable head support, reinforced for complete side impact safety.聽 Thanks for the great giveaway opportunity.聽 ~Pauline ([email protected])
that you only need one seat since it converts to a booster seat
just what i’ve been looking for 馃檪
Love that it goes from infant to booster and has a narrow base.
looks comfortable [email protected]
I love that it converts to a booster.
Thanks for the chance.
[email protected]
I like that it folds flat for travel and storage
I love so many things about Radian: the high weight limit, the steel frame, the small footprint. Thanks for the giveaway!聽
it’s from five lbs to 120 lbs
I love that this goes up to 80#!
I like that the car seat can be a rear seat, front-facing seat, and convert to a booster seat.
My favorite feature is the聽
Steel alloy frame and aluminum reinforced sides for safety….
I love that this seat can be adjusted from newborn to the only and last seat my child would need it foe!
I love that you can use it upto 80 pounds and like the cupholders
Gotta love all the safety features but,聽the seat folds flat for travel and storage — how cool is that?!
I love that it goes from 5-80 pounds….the only carseat my little guy would need!聽 Plus its so narrow there would be no problem putting it in the back seat with 2 other boosters!
聽
I like that it has a steel alloy frame. I love the features that accomate a larger child, such as a longer seat bottom.
I am so in need and in LOVE with this seat!聽 It can go from 5 lbs to 120 lbs!聽 It also is slim so two or more can fit in my small crossover. I need 2! Thank you!!!聽 Mattandcolleen Fuller on FB
Steel alloy frame and aluminum reinforced sides
tvollowitz at aol dot com
Rubber bottom grips.聽 Our current car seat keeps sliding on the seat.
I like that you can fit 3 across the seat of any vehicle!
My favorite feature is the high safety ratings!
My favorite feature is聽聽Adjustable head support, reinforced for complete side impact safety.
The fact that it can be used for a child up to 120 lbs.聽 One carseat for as long as the child needs it! Mickeyfan
I love that it is rear facing up to 45lbs
theresa j
I like that it works from 5 – 120lbs!
I love that it’s the only carseat I’ll ever need!
I like the SuperLATCH system, which makes it easy to install.聽
EPS foam surrounds the child’s head and body to provide complete side impact protection.
My favorite feature is that it goes up to 120 lb
such a huge weight range – I can use this forever!
i like that聽the RadianRXT sits low on a vehicle seat for easy child boarding
The way in converts into a booster..wonderful
聽10 year lifeworks great for us as we have 3 grandkids
I love that the weight limit in higher; up to 120 pounds.聽
I love that it fits 3 across in a mid-size vehicle and has聽additioal shoulder space.
I love that it can hold up to 120 pounds. that is so important for me!
My favorite feature is how it converts to a booster for kids up to 120 lbs. I also appreciate the EPS foam for side impact protection.
-Audra Weathers
I like that it converts to a booster
I really like the steel insides of this car seat!
inalak at msn dot com
I love the booster seat ability
I love that it folds.
love the fact it converts to a booster
Like that it sits low on the seat for easy boarding
I love how narrow it is. With 7 kids we need all the space we can get!
my favorite feature is the 12 height positions for adjustable head support
i like that it has energy-absorbing EPS foam panels on all sides
Adjustable head support.
I like the Steel alloy frame and aluminum reinforced sides
I love how narrow this car seat is! We plan on having many kids, so fitting them all in our vehicle is a must and this car seat makes it easier!
[email protected]
the body support cushions
The car seats can be used with a child of up to 80 pounds .
I love that it goes up to children who are 120 lbs!
I love that it has a 10 year life! My oldest was still in a booster when he was 10陆
I love the safety features.
My favorite feature is that it sits low so my son can climb in easily.
I love that it’s forward facing for up to 80lbs and then a booster for up to 120!!
I love that it is rear facing, forward facing, and a booster. The 10 year life is hard to beat too!! Thanks for the chance. bekki1820cb at gmail dot com
i like the 10 year lifetime- wow
tcogbill at live dot com
I like how it folds and makes for easy storgage
I love that it folds flat for travel and storage.
This looks like a high quality seat- with a 10 year life! Amazing!
I like that it has expandable sides and a 10 year life! I also love that it’s compact. Thanks for the chance! blondredhead at mac dot com
I like the rear facing to 45 lbs feature.
I like the wide range for the weight!聽 It would really come聽be handy.
I love the harness system. 聽But I also love the fact that it folds flat.
Love that it has steel beams!
I love that it Folds flat for travel and storage
I love that it is versatile! 聽That for baby #5 I can get him one seat that he will use from the time he is born til he is 5 or 6
I love the 45lb rear facing weight limit.
I LOVE the fact that it can rear-face till 45 lbs. Rear-facing is SO much safer than forward-facing. =]
my favorite feature is that it goes from 5lbs and up to 120. 聽This would be great for my baby on the way
I like the feature that it has 5 shoulder and 3 buckle positions for custom fit.
I really like that this Diono features rear-facing for children from 5-45 lbs. It makes me feel so much safer!
My fav feature is that it works from very small babe of 5lbs to 120lb kid in a booster… that’s great 馃槈 ~ thanks
rear faces to 45 lbs!
I like that it grows with the child, rear /forward facing, booster
I love that it is truly the only car seat i will ever need. Rear facing to 45 lbs and front facing to 80lbs… how great is that!
I like that it converts to a booster for children up to 120 lbs.
Love that it’s rear facing up to 45lbs and a booster to 120lbs with everything in between!
I love everything about this car seat. The way it changes for different age kids to me is great.
I watch my 4 yr old neice 2-3 days a wk and I can’t take her anywhere because I don’t have a car seat. They’re so expensive so I can’t afford one. I’d love to win this! I love the cobalt blue car seat. Thanks for the awesome giveaway!
I love that is can be rear facing, forward facing and booster mode!
I love that it goes from rear facing to forward then to booster and carries as small as 5 lbs!
I love that it can be rear facing for so long now that it is no longer advised to put children forward facing at 1.
I love the high weight limit and the steel frame.
My favorite feature is that it is rear facing until 45ibs
I like the Energy-absorbing EPS foam panels on all sides
folds for easy storage and the聽Safestop庐 energy-absorbing harness system
I like that it can fit 3 across
My favorite feature is how long it can stay rear-facing. I also like that they are narrow enough to fit 3 across in the backseat!
I love how it folds flat for easy travel
I love that it is designed for an infant of 5 pounds and takes up less room.
Definitely the 5 pt harness
My favorite feature is it fits forward-facing children from 20-80 lbs in a聽5-point harness.
5-point harness!!!!聽
My favorite feature is the high 5-point harness weight limit!
Memory foam padding for superior comfort. Classy. 馃榾
I love how wide the size range is!聽 Impressive.
steel frame
I love that it’s got such an amazing safety rating! Safety is the most important when it comes to your baby
I like that is has a ten year life.
I like that it fits in smaller cars nicely
[email protected]
I love how it folds flat!
Love that this car seat is super safe but also slim for smaller cars!
I love the expandable sides
Love how protective but still comfy for children it is!聽
I like everything about this seat but love that it has soft memory foam and infant support pillows.
I LOVE the fact that it is less bulky and has a high weight limit. This will keep my daughter in a 5 point harness as long as possible.
I love that it can fit 3 across!
I love a lot of the features. My favorite is the energy absorbing harness. Thanks.聽
Definitely love that it can fit 3 across in a car!
LOVE the seat for many reasons, but PLEASE PLEASE PLEASE put the chest clip at arm pit level. Having it on the stomach can cause internal bleeding and/or death in an accident. Even though Im sure this picture was taken just for the blog, Id hate for someone to assume that is how to correctly place it.
I like that it has 12 height positions for adjustable head support.
My favorite feature is that it sits low on a vehicle seat for easy child boarding. That would be so helpful for the grandparents.
I love that it provides so much room for the passenger who rides in front of it, especially with the optional wedge.
I like the patented SafeStop庐 energy absorbing harness
kellywcuATyahooDOTcom
I love that I can firt 3 across in my smaller SUV
i love how compact they are and that three can fit across a backseat!
csilve03 at yahoo dot com
Grows with the child
I love how the car seat can be used in all stages with your child. There would be no need to go out and buy a different seat everytime your child grows out of the old one.
My favorite feature is that it goes up to 120 lb. 聽Awesome!
Love that it can be used with a child up to 80 lbs.
I love that the seats are so narrow! With 4 children in carseats, it gets crowded and seating can be difficult.
I love the fact that with this car seat I would not need to buy one for each stage, infant, toddler, booster. 聽
I am so excited about this car seat!!! I am all about safety and this car seat seems to have it all..it’s hard to pick a favorite!! Lets me…my favorite feature is that it goes up to 120 lbs and that the crash rating on it is so great!! It is so versatile and really is the only car seat we would ever need!!! Thanks for hosting!! Good luck everyone!
I love that it’s from five lbs to 120! It’s the only seat we would need!
I love that it will go from 5 lbs to 120 lbs! I could ride in this car seat! I hope I win!
I have huge kids,95th precentile and above, so I love the 120 lbs weight limit
I like that it goes through all phases from rear-facing all the way to booster seat – so convenient to have all you need in one carseat!
I have to say the cupholder is my favorite. My little boy does not travel without his juice cup!
I can’t decide which is more awesome – the fact that the RXT can rear-face to 45 lbs, or that I will be able to fit 3 carseats in the back row! Baby #3 will have a spot after all. 馃檪
I would love to win this for baby #2!
I love everything about this seat. The 10 year warranty, the versatility, and how safe it is. Even if we do not win we are planning on getting one!