radian® rXT

520 4.55
Price: $299.99

Say hello to the only car seat you could ever need.
Lovingly engineered with a full steel frame, the Diono radian rXT all-in-one car seat provides unmatched safety for your child from birth to booster – and every marvelous moment in between.

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Black Cobalt
Black Scarlet

Product Details

Unmatched safety. All-in-one simplicity.

Your child’s security is our top priority. We engineered our radian® rXT 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! Our radian® rXT car seats fit 3-across in most mid-size vehicles. 

Extended rear-facing

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.

Room to grow

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.

Worth the Weight

Our 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.

radian rXT

Key Features

  • NEW! 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


Andrea Murray
Illinois  |  02.28.2017

“No parent should ever have to turn and look in the backseat to see if their child is still alive, but if you ever do I hope you see what I saw. My child perfectly snug in her Diono car seat; she did not move an inch; her car seat did not move an inch; everything around her was broken, but she was perfect. She did not have a single scratch on her.”

three things you'll love about the radian rXT

  • Experience: Your family heritage is your heart and soul. The diono radian is the heart and soul of our company, as our flagship product. It has a proven track record as a beloved car seat by hundreds of thousands of parents just like you.
  • Comfort: As your daily journey begins with a school drop off or an errand filled day, the sleek design of the radian enables you to board your child easily or give them the joy of boarding themselves.
  • Lifestyle: Overprotecting your child in all the right ways is always on the forefront of our minds. Integrating strong materials to withstand whatever may come your way on the road, standing the tests of baby and toddler life or where ever life may take you.

3 ♥s for diono:

  • unmatched safety: Loved by many and supported by safety advocates.
  • highest comfort: Sleek design for easy boarding and leaves space of other passengers.
  • every marvelous moment: Lovingly engineered with strong material to overprotect your child in all the right ways.