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Diono RadianRXT Convertible Car Seat, Plum

from Diono
1,268 customer reviews
| 21 answered questions

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About the Product

  • The Diono Radian family of car seats are the only convertible+booster seats with a full steel frame making them one of the safest car seats available today
  • Rear facing 5 to 45 pounds. Forward facing 20-80 pounds (up to 57") in 5-point harness. Booster to 120 pounds
  • Infant body support cushions and memory foam for added comfort
  • Adjustable headrest with reinforced sidewalls
  • Lined with EPS foam and energy-absorbing harness system for added safety
  • Folds flat for travel and fits 3 across in mid-sized vehicles
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Frequently Bought Together

  • Diono RadianRXT Convertible Car Seat, Plum
  • +
  • Diono Radian Angle Adjuster
  • +
  • Diono Ultra Mat Full-Size Seat Protector, Black
Total price: $319.40
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Product Description


The RadianRXT is a highly versatile car seat that could be the only seat you’ll ever need. It comfortably seats rear-facing children from 5-45 pounds, forward-facing children from 20-80 pounds in 5-point harness, then converts to a booster for children up to 120 pounds It’s 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 pounds 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 won’t outgrow.

Product Information

Color: Plum
Technical Details
Item Weight24 pounds
Product Dimensions10 x 17 x 28.5 inches
Item model number16910
Target genderUnisex
Minimum weight recommendation5 Pounds
Maximum weight recommendation120 Pounds
Number of items1
Best useschild safety seat
Batteries requiredNo
OrientationForward / Rear Facing
Harness type5 pt
Seating capacity20.00
Technical Specification
Additional Information
Best Sellers Rank #3,529 in Baby (See top 100)
Shipping Weight31.2 pounds (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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From the Manufacturer

The Only Car Seat You'll Ever Need

Safety Features Protect Your Child from Injury

The RadianRXT's design begins with a full steel frame for a foundation that stands strong while other features disseminate crash forces away from your child. Aluminum reinforced side walls and head support lined with thick, energy absorbing EPS foam provide excellent side impact protection. The SafeStop energy absorbing harness provides extra protection for children 20 to 40 pounds in the forward-facing position. When installed, SafeStop provides bungee-like energy absorption which reduces impact on the child. Additionally, the RadianRXT boasts rear-facing tether capability to reduce seat rotation during an impact. 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 10 years of life.

Adaptable Design Accommodates Growing Children, and Growing Families

The RadianRXT can be adapted to your child as they grow, keeping their car rides safe and comfortable for years. It fits children in the rear-facing position weighing from 5 to 45 pounds, and children in the forward-facing position weighing from 20 to 80 pounds. The RadianRXT also converts to a booster seat for kids up to 120 pounds. An adjustable, reinforced head support offers 12 height settings to ensure the right fit for your child and provides additional side impact safety. Thanks to its exceptionally slim profile, the RadianRXT can sit three across in most vehicles. Because it does not have a pedestal the seat sits relatively low, making child boarding easy. It also features a folding design, so storing or transporting the seat is easy. The car seat is FAA approved for use on airplanes. The machine washable cover and cup holder compatibility (up to four, one included) make this car seat even more convenient.

Comfortable Ride for Little Ones

All Radian seats have a deep shell that provides a more comfortable rear-facing ride, as well as a higher rear-facing capacity. This car seat features a plush cloth surface that feels soft against your little one's skin. Expandable sides and a longer seat bottom offer better leg support, and help keep children cozy as well as helping maintain a custom fit throughout their physical development. Two forward-facing recline positions allow the RadianRXT to fit a wide variety of vehicle seats. Body support cushions ensure infants and babies are safe, snug and positioned correctly.

Key Features

  • Fits rear-facing children from 5 - 45 lbs
  • Fits forward-facing children from 20 - 80 lbs
  • Converts to booster mode for children from 50 - 120 lbs
  • Full steel frame
  • SafeStop energy absorbing harness system
  • Adjustable, reinforced headrest
  • NCAP crash tested at twice the force of a standard crash test
  • Unique SuperLATCH installation
  • Infant body support cushions and memory foam for added comfort
  • 5 shoulder, 3 buckle positions for a comfortable ride
  • Fits 3 across in most mid-size vehicles
  • FAA certified
  • Folds flat for travel and storage
  • One cup holder included
  • 10 year product life

Extended Rear-Facing

Seats children from 5 - 45 pounds in a 5-point harness.

Forward-Facing to 80 pounds

Seats children from 20 - 80 pounds in a 5-point harness.

Converts to a Booster

Seats children from 50 - 120 pounds in booster mode.

Full Steel Frame

A full steel frame, aluminum reinforced sides, and energy absorbing EPS foam provide unmatched strength and safety.

Adjustable Headrest

12 height positions and aluminum reinforcement offer an additional layer of protection that grows with your child.

Fits 3 Across

Thanks to its exceptionally slim profile, the RadianRXT can sit 3 across in most mid-size vehicles.

Folds Flat

Features a folding design so storing or traveling with the seat is easy.

SuperLATCH Installation

Diono's unique SuperLATCH system makes installation easy, strong and secure. An audible click and visual indicator let you know when the connectors are locked.

Total Side Impact Protection

Aluminum reinforced sides and headrest are lined with EPS foam to provide total side impact protection for your child.

NCAP Crash Tested

Every Diono car seat surpasses Federal crash test standards and meets NCAP standards, the industry benchmark for verifying child seat performance in severe crash conditions. An NCAP crash test is twice the force of a standard crash test.

Top Tether

Rear-facing tether capability helps reduce seat rotation during an impact. This unique feature is not found on every car seat and provides an extra layer of protection when your child is rear-facing.