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Diono Radian RXT Convertible Car Seat - Daytona

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Diono Radian RXT Convertible Car Seat - Daytona - Diono  - Babies"R"Us
Diono Radian RXT Convertible Car Seat - Daytona - Diono  - Babies"R"Us
Diono Radian RXT Convertible Car Seat - Daytona - Diono  - Babies"R"Us
  • $339.99
  • $299.99
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Thanks to a versatile design, the Diono RadianRXT Birth to Booster Car Seat could be the only seat you'll ever need. With its adjustable features, this seat can safely accommodate children from birth until they have grown to 120 pounds and 57 inches tall. The RadianRXT is designed with your child’s security and safety as top priorities. Premium materials and thoughtful safety features like a steel alloy frame, aluminum reinforced side walls, energy absorbing EPS foam, a five-point harness, and adjustable head support keep your mind at ease as your little one stays safe and sound.

  • Seat features three modes to accommodate growing children
  • Designed with a steel alloy frame and energy absorbing EPS foam
  • Reinforced head support for additional side impact protection
  • Easy-to-clean cover is soft against child's skin
  • Memory foam padding for extra comfort
  • SuperLATCH for a secure installation
  • Five-point harness provides dependable security
  • Infant support cushions keep your baby positioned correctly
  • Approved for use on airplanes
  • Age/Weight Requirements: 5 - 45 pounds rear-facing; 20 - 80 pounds forward-facing. Booster mode fits children weighing up to 120 pounds or up to 57 inches tall
  • Assembly Requirements: Some assembly required
  • Warranty: One-year limited warranty

Included in the Box

RadianRXT Daytona Birth to Booster Car Seat, rear-facing base, infant support cushions, SafeStop harness, rear-facing tether connector strap, one cup holder, and instruction manual.

*For vehicles manufactured AFTER September 2005. For vehicles manufactured prior to September 2005, consult the vehicle owner's manual for lower anchor weight limits.

Trademark Information:

RadianRXT Convertible plus Booster Car Seat (Daytona) Product Image


Steel Alloy Frame

Steel Alloy Frame Padded with EPS Foam Protects Your Child

The RadianRXT features a steel alloy frame for a strong foundation. Aluminum reinforced side walls and head support are lined with thick, energy absorbing EPS foam for side impact protection. The SafeStop energy absorbing harness provides extra protection for children 20 to 40 pounds. When installed, the harness's bungee-like energy absorption reduces impact when your child is seated in the forward-facing position. Additionally, the RadianRXT boasts rear-facing tether capability to reduce seat rotation in the event of an impact.

Accomodates Growing Children

Versatile Seat Grows With Your Child

The RadianRXT offers the adaptability you need to keep your child's car rides safe and comfortable. The seat fits children in the rear-facing position from 5 to 45 pounds and from 20 to 80 pounds in the forward-facing position. An adjustable, reinforced head support with 12 height settings ensures a custom fit and offers additional side impact safety. With longevity in mind, this model converts to a booster seat for kids up to 120 pounds.

Rear-Facing Position

Deep Seat Design and Plush Cover for a Comfy Ride

All Radian seats have a deep shell to cradle your child for a more comfortable rear-facing ride and to provide a higher rear-facing capacity. A plush cloth surface feels soft against your little one's skin. Expandable sides and a longer seat bottom offer better leg support and help keep children cradled in a custom fit that adapts throughout their physical development. Two forward-facing recline positions allow the RadianRXT to fit a wide variety of vehicle seats. Body support cushions keep infants and babies snug and positioned correctly.

SuperLATCH Installation

SuperLATCH Feature for Secure Installation

Diono’s SuperLATCH feature makes use of your car's LATCH system to take advantage of the RadianRXT's full weight capacity.* The SuperLATCH connectors are successfully crash tested for children weighing up to 45 pounds rear-facing and up to 80 pounds forward-facing. In vehicles with LATCH anchors, SuperLATCH is a safe, convenient way to install the RadianRXT. Rubber bottom grips protect your car's upholstery and ensure the seat won't slide after installation.

Compact Design

Slim Profile and Convenient Features

A slim profile means the RadianRXT can sit three across in most vehicles. Because it doesn't have a pedestal, the seat sits relatively low which allows the child to board with ease. The seat folds up when not in use, so storing or transporting the seat is easy. The machine-washable cover and cup holder compatibility (one included, you can add up to four per seat) make this car seat even more convenient.

NCAP Crash Tested

Testing and Warranty Information

This car seat surpasses federal crash test standards and meets NCAP standards, the industry benchmark for verifying child seat performance in severe accident conditions. The RXT is tested at its maximum forward-facing, rear-facing and booster weight capacities and is rated for an impressive 10 years of life. The car seat is also FAA approved for use on airplanes. The Diono RadianRXT Birth to Booster Car Seat is backed by a manufacturer's limited one-year warranty.

Product Description

The Diono RadianRXT is a highly versatile car seat that could be the only seat youll ever need. It comfortably seats rear-facing children from 5-45 lbs, forward-facing children from 20-80 lbs in 5-point harness, then converts to a booster for children up to 120 lbs. Its built for strength and safety with a steel alloy frame, reinforced sidewalls, adjustable head support and our patented SafeStop energy absorbing harness. EPS foam surrounds the child's head and body to provide complete side impact protection. Our unique SuperLATCH system makes installation easy.

The RadianRXT is NCAP crash tested, the industry benchmark for verifying child seat performance in severe accident conditions, and the only car seat rated for LATCH use with a child up to 80 lbs. The RadianRXT sits low on a vehicle seat for easy child boarding, features memory foam padding and infant support pillows. Expandable sides and a longer seat bottom provide extra room and comfort for your growing child. One cup holder is included, with the option to add up to 4 cup holders. In addition to all this versatility, it folds flat for travel and storage, has a 10 year life and offers amazing safety, comfort and convenience your child wont outgrow.


  • The Diono RadianRXT is rear-facing: 5 - 45 lbs; Forward-facing: 20 - 80 lbs and up to 57 inches in a 5-point harness; Booster to 120 lbs
  • Steel alloy frame and aluminum reinforced sides; SafeStop energy absorbing harness; Adjustable head support, reinforced for complete side impact safety: Energy absorbing EPS foam panels on all sides
  • Rear-facing tether capability; LATCH installation up to 80 lb child; 5 shoulder and 3 buckle positions for custom fit; Expandable sides and longer seat bottom for leg support and comfort
  • 2 recline positions in forward-facing mode; Sits low on vehicle seat for easy child boarding; Fits 3 across in a mid-size vehicle and offers more shoulder space
  • Folds flat for travel and storage

Additional Info





5 lbs

120 lbs


Adjustable Head Support,Cup Holder(s)



31.3 pounds

29.5 x 17.2 x 10.0

How to Get It

  • This item can be shipped to the entire United States including Alaska, Hawaii, and all U.S. territories including Puerto Rico
  • This item can also be shipped to APO/FPO addresses and to P.O. Boxes in all 50 states
  • Due to shipping restrictions, Ship Charges will be separate from other items in your order
  • This item will ship by itself

  • This item may be shipped via Standard Shipping, Expedited Shipping or Express Shipping
  • Please Note: Some addresses are eligible for Standard Shipping only (APO/FPO, P.O. Boxes, U.S. Territories and Puerto Rico)

(learn more):

  • This item is sold online only (not sold in stores)
  • Orders placed for Store Pickup will receive online pricing and promotions
  • In-stock status is approximate and may not reflect recent sales
  • Not all items are carried at all stores. Please click the "Select a store" link to check product availability
This item may be shipped in the manufacturer's original packaging, which could reveal the contents of the box

Average Customer Rating:

by PowerReviews
Diono Radian RXT Convertible Car Seat - Daytona

(based on 268 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.


  • Comfortable (10)
  • Durable (9)
  • Safe (9)
  • Stylish (9)
  • Easy to adjust (8)


  • Heavy (5)

Best Uses

  • Infants (8)
  • Toddler (8)
  • Newborn (5)
    • Reviewer Profile:
    • Parent of two or more children (6), First time parent (4)

Most Helpful Positive Review


Survived Car Crash

I ordered this car seat over a year ago and it has held up very well! It still looked brand new and though heavy, once installed it did not budge an inch. My...Read complete review

I ordered this car seat over a year ago and it has held up very well! It still looked brand new and though heavy, once installed it did not budge an inch. My daughter (just turned 2) was very comfortable in it and would sit in it for hours compared to her infant car seat. Yesterday it was tested to its fullest when my daughter and I were in a car crash that totaled the car. We smashed into the ground and rolled over a few times and she felt none of it! The car seat absorbed everything and my daughter was actually laughing once the car stopped. No whiplash and the car seat had not budged an inch due to its weight and how it was installed. The doctor and police told us to buy the same car seat again because it is what kept her from being harmed and were amazed that she didn't even have a little bit of whiplash. I did not fair so well, but will be buying this again happy to know it is true quality!


Most Helpful Critical Review


Disappointed and not impressed...

I had to do my research on the best carseat for our family since I have a smaller car ('05 Toyota Corolla)--and realized that I may have an issue with giving the...Read complete review

I had to do my research on the best carseat for our family since I have a smaller car ('05 Toyota Corolla)--and realized that I may have an issue with giving the front passenger enough leg room for them to be somewhat comfortable. After thorough research for the best type of carseats for compact cars, it came down to the Diono Radian RXT and a competitor brand. While I wasn't keen on the price (paid over $550 for two for our two vehicles), I felt that it was the right fit for our family based on the exceptional reviews I had read about, espeically for the safety reasons. My gripe with this carseat is that once my son is in it (currently it is rear facing) and I pull up on the strap to tighten him in, the straps NEVER get tight enough. At first I thought that maybe it was the way I installed it, so I uninstalled it, checked the straps and reinstalled it. Again, I have to pull so hard on the strap that I can literally make my car rock back and forth! I thought maybe it was just the angle that it happened to be in while in my car, but when I tried the strap on the seat in my husband's car (Mercury Mariner), it was even worse! You can barely pull up on the strap--it's almost like something is getting caught and won't let you pull up on it, but there's nothing in the way, so I don't know why it's so hard. To "fix" this, I have to pull on the (exposed) straps in the back to get the slack tightened and then at the same time, pull up on the strap to get rid of the slack. I cringe everytime I put my son in it and wish that I had never bought them. Another reason why I bought them was because it was rated to 120 pounds and that it would have to be the only car seat I buy. Instead of thinking that this is the only car seat I'll have to buy, I'm debating if I should purchase new ones--and who has the money to do that all over again...To make matters worse, we moved at the same time and of course threw out the boxes, so returning them wasn't an option. Overall, I was very excited to get them, but disappointed once they were installed.

Reviewed by 268 customers

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Displaying reviews 1-10

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Great seat!

By Mama of three busy bees

from Syracuse, NY

About Me Parent of Two or More Children

Verified Buyer


  • Comfortable
  • Easy to Adjust


  • Hard to Install

Best Uses

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    I bought 3 of these seats for my 3 children. All 3 seats fit in my mid size SUV and their safety rating was a huge factor in our decision to purchase. So far, we love the five point harness better than any other we've had so far.

    Comment on this review


    great slim profile

    By babyphat013

    from Fredericksburg, VA, United States

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    We bought this with 3rd child on the way. After trying multiple carseats this was the only one to fit with our other 2 car seats, one infant Chico, and other convertible evenflo. Very good quality, easy for my 3 year old to get in and out of. Only con is its heavy and takes up lots of driver side space if using it rear facing.

    Comment on this review


    Works great. My child is ...

    By sem17

    from Ft Lauderdale, FL, United States

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    Works great. My child is comfortable as she has already taken a handful of naps in the car since installing it. Only thing if the seat is intended to use the foam block/ adjuster it should probably come with one. However I have read that people end up ordering more after only a few months as it will flatten and so I ended up using a sturdy cotton rug folded to give the same affect to lift the seat up & so far its doing the trick. Either way I would buy this seat again for my next child.

    Comment on this review


    Cool Colors

    By bordenja

    from Undisclosed

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    Storm and Plum are my favorite colors, but they are all good choices.

    Comment on this review


    we LOVE our radian!

    By carmynspring

    from Ely, NV, United States

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    We've had our radian rxt for about a year now and my toddler has no complaints. Its got great rearfacing limits and its so compact with the angle adjuster. I called customer service to get different straps and they were amazingly helpful.

    Comment on this review


    Easy Install, Very Secure

    By Christy

    from Colorado

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    I bought this to replace my expired Britax Marathon. I have a 2015 Ford Explorer and use the latch with tether on the side seat (this would not fit in the middle row middle seat without blocking access to other seat belts). I love this seat and have two other boosters in the same row (Bubble Bum and Graco). The seat is very secure and my son seems to enjoy it more than he did the Britax. Two things I feel are worth mentioning, 1) in my explorer you could not fit three of these across and you cannot fit two regular sized boosters in the same row with this seat, 2) this seat sits lower than the britax so my son cannot see out the window as much but he is able to get in his seat on his own. Overall, this is a great car seat! And side note, my son threw up all over his seat and it was very easy to take the cover off and wash the seat. The cover also washed very well.

    Comment on this review


    3 across and comfortable!

    By MamaBruff

    from Lubbock, TX

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    We bought this after reading a review on Carseats For the Littles about 3 across in a Honda CR-V. With a third baby due soon, we needed just that in our CR-V. Our FF 4 year old is now in a Diono R120 as is our RF 2 year old. The kids love them and are comfortable. My husband was able to install them really well, as was confirmed when we had a CPST check the install. We love the safety reputation of Dionos and fit for our vehicle. So far the only struggle is that the harness just doesn't snug as securely as our previous carseats, though it passes the "pinch" test at the collar bone and the CPST checked both our kids buckled in and assured us they are tight enough... it isn't easy to get them secure like I like. For our 2 year old, the longer pads for the harness straps are just too big and we wish the shorter ones were included with the purchase as now we have to figure out how to get them for her. Other than these two things, we are pleased with our purchase.

    Comment on this review


    Low profile and extended rear facing

    By amandatx

    from Dallas, TX, United States

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    My oldest son has been in his diono since he was about a year. He's 2.5 now, in the 97th percentile for height and still rear facing. We recently purchased the RAT for my now 6 month old. He no longer screams when we get in the car, which is reason enough for 5 stars. We put the seats neXT to each other and there is room for my 6 foot 1 husband to sit next to them.

    Comment on this review


    love this car seat

    By Agiomom

    from Long Pond, PA, United States

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    I have bought this car seat a month ago for my 8 month old. I loved it so much that I replace my 4 & 2 year olds car seats with this product as well. They are all happy now that they can all sit next to eachother in are van. As well as they are very sturdy seat which my children are extremely comfortable in. I dont find my four year olds head hanging all the way over anymore as in her other seat. Over all I would recommend this product to anyone. So happy with my purchase!

    Comment on this review


    Great for Forward Facing

    By Brandi

    from Colorado Springs, CO, United States

    Comments about Diono Radian RXT Convertible Car Seat - Daytona:

    We bought this last month and have been pleased with everything except the rear facing attachment. It definitely makes the seat extend into the front seat area much more. I'm 5'4" and had a neck ache after driving for an hour with it behind me in our Toyota RAV4. Fortunately, we were able to move it to the middle and that fixed the problem.

    Comment on this review

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