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Diono Radian RXT Convertible

Disclosure: The Radian RXT  Car Seat in the feature below was sent compliments of Diono!

With the birth of Emmitt, fitting three car seats in my car was a must. Finding car seats that my children were safe in and would fit three across, was a bit harder than I expected. So when I finally got my hands on a few Diono seats I was more than excited. The Diono Radian RXT is a 3-in-1 (rear-facing, forward-facing, and booster) convertible seat that all of my kids can fit in and it easily fits three across in most

The Diono Radian RXT Allows You To-
-Comfortably seats rear-facing children from 5-45 lbs.
-Easily forward-face children from 20 – 80 lbs, keeping them harnessed longer.
-Booster mode from 50 – 120 lbs (40 to 57 inches)

From left to right we have one year old, three years old, almost five years old, and seven years old!

The 45 pound rear-facing weight limit is currently the highest on the market, which makes extended rear facing easier than ever. The high 80 pound weight limit means that heavier children will be able to stay in the seat longer before moving to a booster, which makes extended harnessing easier than ever!

My seven year old is in the 85th percentile for weight and can still fit in the RXT perfectly. The RXT also has three crotch strap positions located approximately 3.5”, 5.5”, and 7” from the back of the seat which allows the seat to grow with your child. Nothing more annoying than having to dig under a five or six year old to find a buckle.

The harness height is not so easy to adjust. It adjusts from the back of the seat, so you do have to uninstall the seat. Each strap is removed from the metal  plate and rethreaded through the correct harness slot.

Diono Raidan Three Across

Installing the Diono Radian RXT was very easy. It has the deluxe push-on style LATCH connectors that I love. They store at the top of the shell when not in use. The manual says that the tether strap can be used rear- or forward-facing, but for the life of me I can not figure out how to use it rear-facing. I love the instruction manual though. I don’t often rave about a manual in a review- but the Diono Radian RXT manual comes with nifty QWERTY codes that I can scan with my phone and watch a video that shows me how to do it!

Diono RadianIf your looking for a car seat that will last for a long time, or one that you can pass down from child to child, this is the seat. he RXT has 2 separate expiration dates. If you use the harness (up to 80lbs) the RXT expires 8 years from date of manufacture. When used as a booster without the harness, the seat expires 10 years from date of manufacture.

321091_232849180101096_433729810_nThis is not a light weight car seat! It weighs in at a whopping 24 lbs but comes with a padded shoulder strap for carrying.To be honest it being this heavy only makes me feel safer putting my little one (or big one) in it! I have a Sunshine Kids Radian as well and not much has changed from one seat to another. If you are looking for a safe car seat that is going to last you a very hard time, the Diono Radian RXT is definitely a seat to check out!

Buy It: You can purchase a Diono Radian RXT Convertible Car Seat on Amazon for 239.99.



Skye About Skye

Real Mom Review's founder and main author, Skye Moyer is a 26 year old, stay at home mother of four beautiful children who is currently traveling all over the U.S. in her RV! She has been married to her best friend for eight years and is happiest when surrounded by family & friends!


  1. My son is off the charts big and will be too big to RF in our Serena soon, and he’s not even 2 yet! Since the Radian RFs longer than any other seat it’s our only option. I want one in Cobalt for him, and one in purple for our daughter.

  2. Rebecca Jeanne says:

    Do you think it’s possible to install one of these RF in a Corolla (we have an 08) and still have enough room in the front seats? We’re expecting our first and I’m trying to figure out if I should get a RXT for this car or try to find something else for the Corolla.

  3. wow!!! i love how long this bad boy will last you!!! perfect for me!!!

  4. Shanah Bradley says:

    The only car seat you will ever have to buy for your child/children. I’ll admit that it is more then I would spend on a car seat but seeing that just one seat will last from birth to well past when my child will need a car seat it is well worth the extra cost.

  5. Michelle E says:

    its important to get the right kind

  6. This looks like a great carseat! We are looking for something bigger for our daughter and I think this sounds wonderful.

  7. Lo Sutcliffe says:

    This seat looks awesome!

  8. Im so excited because my husband HATES our carseat (no not why im excited) that we have now and said we could upgrade to one of these come tax season! Not sure if im going to buy two, one for my 4 year old (she has a graco nautilus) or just one for my youngest daughter. I love that we can fit 3 in the back of our car. One day we will have 3 kids, and won’t want to buy another car just because we can’t get the seats to fit in the back but we don’t want to have to worry about safety either. These are a win win for us! Small, compact, high weight limit/ height limit so excited!

  9. How awesome that this seat can be used until 80lbs and an easy install is always very appreciated!

  10. After using your seats for awhile are you finding the headrests to be a burden or are they useful? I have a little one who will most likely be tall. Many reviews I have found state the headrests can start to get in the way of kid’s shoulders or impede their view. Therefore I am now trying to decide whether to go for the Pacifica or the Rainier (updated version of Radian so I am told). The Pacifica is the exact same except lacks the headrests. Would it be practical to go with the Pacifica and just add some homemade pillow-type of support. Also, my vehicle has rear side curtain airbags.

  11. OMG the picture of all of your kids in the Diono seat is so cute and cool! I just wanted to comment on that!

  12. We fit our RXT in our 2010 Civic for over a year until I found THIS amazing Diono angle adjuster. Gives my wife 4 more inches in the passenger seat. It makes it a little harder to get the kid in and out as it’s pushing it more vertical, but Diono sells it so it is safe.


  13. I am looking to purchase a Diono Radian RXT for my toddler. One thing that is concerning me is that she will have plenty of room for her legs and feet because she is still rear-facing. Can anyone clear things up for me?

  14. I’m so glad that the internet allows free info like this!


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